diff --git a/src/Actor.h b/src/Actor.h
index 919d4994f7..ac30557190 100644
--- a/src/Actor.h
+++ b/src/Actor.h
@@ -403,9 +403,9 @@ public:
 	void  AddRotationR( float rot );
 
 	void SetSkewX( float fAmount )			{ DestTweenState().fSkewX = fAmount; }
-	float GetSkewX( float fAmount ) const		{ return DestTweenState().fSkewX; }
+	float GetSkewX( float /* fAmount */ ) const		{ return DestTweenState().fSkewX; }
 	void SetSkewY( float fAmount )			{ DestTweenState().fSkewY = fAmount; }
-	float GetSkewY( float fAmount ) const		{ return DestTweenState().fSkewY; }
+	float GetSkewY( float /* fAmount */ ) const		{ return DestTweenState().fSkewY; }
 
 	float GetCropLeft() const			{ return DestTweenState().crop.left; }
 	float GetCropTop() const			{ return DestTweenState().crop.top; }
@@ -602,10 +602,10 @@ public:
 
 	// Animation
 	virtual int GetNumStates() const { return 1; }
-	virtual void SetState( int iNewState ) {}
+	virtual void SetState( int /* iNewState */ ) {}
 	virtual float GetAnimationLengthSeconds() const { return 0; }
-	virtual void SetSecondsIntoAnimation( float fSeconds ) {}
-	virtual void SetUpdateRate( float fRate ) {}
+	virtual void SetSecondsIntoAnimation( float ) {}
+	virtual void SetUpdateRate( float ) {}
 
 	HiddenPtr<LuaClass> m_pLuaInstance;
 
diff --git a/src/OptionRowHandler.cpp b/src/OptionRowHandler.cpp
index 0c63cf1086..b2c1bacf42 100644
--- a/src/OptionRowHandler.cpp
+++ b/src/OptionRowHandler.cpp
@@ -399,7 +399,7 @@ class OptionRowHandlerListNoteSkins : public OptionRowHandlerList
 // XXX: very similar to OptionRowHandlerSteps
 class OptionRowHandlerListSteps : public OptionRowHandlerList
 {
-	virtual void LoadInternal( const Commands &cmds )
+	virtual void LoadInternal( const Commands & )
 	{
 		m_Def.m_sName = "Steps";
 		m_Def.m_bAllowThemeItems = false;	// we theme the text ourself
@@ -666,7 +666,7 @@ public:
 
 class OptionRowHandlerListCharacters: public OptionRowHandlerList
 {
-	virtual void LoadInternal( const Commands &cmds )
+	virtual void LoadInternal( const Commands & )
 	{
 		m_Def.m_bOneChoiceForAllPlayers = false;
 		m_Def.m_bAllowThemeItems = false;
@@ -699,7 +699,7 @@ class OptionRowHandlerListCharacters: public OptionRowHandlerList
 
 class OptionRowHandlerListStyles: public OptionRowHandlerList
 {
-	virtual void LoadInternal( const Commands &cmds )
+	virtual void LoadInternal( const Commands & )
 	{
 		m_Def.m_bOneChoiceForAllPlayers = true;
 		m_Def.m_sName = "Style";
@@ -722,7 +722,7 @@ class OptionRowHandlerListStyles: public OptionRowHandlerList
 
 class OptionRowHandlerListGroups: public OptionRowHandlerList
 {
-	virtual void LoadInternal( const Commands &cmds )
+	virtual void LoadInternal( const Commands & )
 	{
 		m_Def.m_bOneChoiceForAllPlayers = true;
 		m_Def.m_bAllowThemeItems = false;	// we theme the text ourself
@@ -752,7 +752,7 @@ class OptionRowHandlerListGroups: public OptionRowHandlerList
 
 class OptionRowHandlerListDifficulties: public OptionRowHandlerList
 {
-	virtual void LoadInternal( const Commands &cmds )
+	virtual void LoadInternal( const Commands & )
 	{
 		m_Def.m_bOneChoiceForAllPlayers = true;
 		m_Def.m_sName = "Difficulty";
@@ -783,7 +783,7 @@ class OptionRowHandlerListDifficulties: public OptionRowHandlerList
 // XXX: very similar to OptionRowHandlerSongChoices
 class OptionRowHandlerListSongsInCurrentSongGroup: public OptionRowHandlerList
 {
-	virtual void LoadInternal( const Commands &cmds )
+	virtual void LoadInternal( const Commands & )
 	{
 		const vector<Song*> &vpSongs = SONGMAN->GetSongs( GAMESTATE->m_sPreferredSongGroup );
 
@@ -1139,7 +1139,7 @@ public:
 
 		m_Def.m_sName = m_pOpt->name;
 	}
-	virtual void ImportOption( OptionRow *pRow, const vector<PlayerNumber> &vpns, vector<bool> vbSelectedOut[NUM_PLAYERS] ) const
+	virtual void ImportOption( OptionRow *, const vector<PlayerNumber> &vpns, vector<bool> vbSelectedOut[NUM_PLAYERS] ) const
 	{
 		FOREACH_CONST( PlayerNumber, vpns, pn )
 		{
diff --git a/src/OptionRowHandler.h b/src/OptionRowHandler.h
index 3a443849ce..232ccafee6 100644
--- a/src/OptionRowHandler.h
+++ b/src/OptionRowHandler.h
@@ -158,7 +158,7 @@ public:
 	RString OptionTitle() const;
 	RString GetThemedItemText( int iChoice ) const;
 
-	virtual void LoadInternal( const Commands &cmds ) { }
+	virtual void LoadInternal( const Commands & ) { }
 
 	/* We may re-use OptionRowHandlers. This is called before each use. If the
 	 * contents of the row are dependent on external state (for example, the
@@ -173,11 +173,11 @@ public:
 	virtual ReloadChanged Reload() { return RELOAD_CHANGED_NONE; }
 
 	virtual int GetDefaultOption() const { return -1; }
-	virtual void ImportOption( OptionRow *pRow, const vector<PlayerNumber> &vpns, vector<bool> vbSelectedOut[NUM_PLAYERS] ) const { }
+	virtual void ImportOption( OptionRow *, const vector<PlayerNumber> &, vector<bool> vbSelectedOut[NUM_PLAYERS] ) const { }
 	// Returns an OPT mask.
-	virtual int ExportOption( const vector<PlayerNumber> &vpns, const vector<bool> vbSelected[NUM_PLAYERS] ) const { return 0; }
+	virtual int ExportOption( const vector<PlayerNumber> &, const vector<bool> vbSelected[NUM_PLAYERS] ) const { return 0; }
 	virtual void GetIconTextAndGameCommand( int iFirstSelection, RString &sIconTextOut, GameCommand &gcOut ) const;
-	virtual RString GetScreen( int iChoice ) const { return RString(); }
+	virtual RString GetScreen( int /* iChoice */ ) const { return RString(); }
 };
 
 /** @brief Utilities for the OptionRowHandlers. */
diff --git a/src/RageDisplay.h b/src/RageDisplay.h
index 2338fca0ae..3aa8f6e836 100644
--- a/src/RageDisplay.h
+++ b/src/RageDisplay.h
@@ -242,7 +242,7 @@ public:
 	 * DeleteTexture. (UpdateTexture is not permitted.) Returns 0 if render-to-
 	 * texture is unsupported.
 	 */
-	virtual unsigned CreateRenderTarget( const RenderTargetParam &param, int &iTextureWidthOut, int &iTextureHeightOut ) { return 0; }
+	virtual unsigned CreateRenderTarget( const RenderTargetParam &, int & /* iTextureWidthOut */, int & /* iTextureHeightOut */ ) { return 0; }
 
 	/* Set the render target, or 0 to resume rendering to the framebuffer. An active render
 	 * target may not be used as a texture. If bPreserveTexture is true, the contents
@@ -299,8 +299,8 @@ public:
 	void DrawQuad( const RageSpriteVertex v[] ) { DrawQuads(v,4); } /* alias. upper-left, upper-right, lower-left, lower-right */
 
 	// hacks for cell-shaded models
-	virtual void SetPolygonMode( PolygonMode pm ) {}
-	virtual void SetLineWidth( float fWidth ) {}
+	virtual void SetPolygonMode( PolygonMode ) {}
+	virtual void SetLineWidth( float ) {}
 
 	enum GraphicsFileFormat
 	{
@@ -311,9 +311,9 @@ public:
 	};
 	bool SaveScreenshot( RString sPath, GraphicsFileFormat format );
 
-	virtual RString GetTextureDiagnostics( unsigned id ) const { return RString(); }
+	virtual RString GetTextureDiagnostics( unsigned /* id */ ) const { return RString(); }
 	virtual RageSurface* CreateScreenshot() = 0;	// allocates a surface.  Caller must delete it.
-	virtual RageSurface *GetTexture( unsigned iTexture ) { return NULL; } // allocates a surface.  Caller must delete it.
+	virtual RageSurface *GetTexture( unsigned /* iTexture */ ) { return NULL; } // allocates a surface.  Caller must delete it.
 
 protected:
 	virtual void DrawQuadsInternal( const RageSpriteVertex v[], int iNumVerts ) = 0;
diff --git a/src/RageDisplay_Null.cpp b/src/RageDisplay_Null.cpp
index 0815006dce..458ad8b14d 100644
--- a/src/RageDisplay_Null.cpp
+++ b/src/RageDisplay_Null.cpp
@@ -128,8 +128,8 @@ class RageCompiledGeometryNull : public RageCompiledGeometry
 {
 public:
 	
-	void Allocate( const vector<msMesh> &vMeshes ) {}
-	void Change( const vector<msMesh> &vMeshes ) {}
+	void Allocate( const vector<msMesh> & ) {}
+	void Change( const vector<msMesh> & ) {}
 	void Draw( int iMeshIndex ) const {}
 };
 
diff --git a/src/RageDisplay_Null.h b/src/RageDisplay_Null.h
index b05e425ed2..4d2924d8f1 100644
--- a/src/RageDisplay_Null.h
+++ b/src/RageDisplay_Null.h
@@ -17,25 +17,25 @@ public:
 	void EndFrame();
 	VideoModeParams GetActualVideoModeParams() const { return m_Params; }
 	void SetBlendMode( BlendMode ) { }
-	bool SupportsTextureFormat( PixelFormat, bool realtime=false ) { return true; }
+	bool SupportsTextureFormat( PixelFormat, bool /* realtime */ =false ) { return true; }
 	bool SupportsPerVertexMatrixScale() { return false; }
 	unsigned CreateTexture( 
 		PixelFormat, 
 		RageSurface* /* img */,
 		bool /* bGenerateMipMaps */ ) { return 1; }
 	void UpdateTexture( 
-		unsigned iTexHandle, 
-		RageSurface* img,
-		int xoffset, int yoffset, int width, int height 
+		unsigned /* iTexHandle */, 
+		RageSurface* /* img */,
+		int /* xoffset */, int /* yoffset */, int /* width */, int /* height */ 
 		) { }
 	void DeleteTexture( unsigned /* iTexHandle */ ) { }
 	void ClearAllTextures() { }
 	int GetNumTextureUnits() { return 1; }
-	void SetTexture( TextureUnit tu, unsigned iTexture ) { }
-	void SetTextureMode( TextureUnit tu, TextureMode tm ) { }
-	void SetTextureWrapping( TextureUnit tu, bool ) { }
+	void SetTexture( TextureUnit, unsigned /* iTexture */ ) { }
+	void SetTextureMode( TextureUnit, TextureMode ) { }
+	void SetTextureWrapping( TextureUnit, bool ) { }
 	int GetMaxTextureSize() const { return 2048; }
-	void SetTextureFiltering( TextureUnit tu, bool ) { }
+	void SetTextureFiltering( TextureUnit, bool ) { }
 	bool IsZWriteEnabled() const { return false; }
 	bool IsZTestEnabled() const { return false; }
 	void SetZWrite( bool ) { }
@@ -54,7 +54,7 @@ public:
 	void SetLighting( bool ) { }
 	void SetLightOff( int /* index */ ) { }
 	void SetLightDirectional( 
-		int index, 
+		int /* index */, 
 		const RageColor & /* unreferenced: ambient */, 
 		const RageColor & /* unreferenced: diffuse */, 
 		const RageColor & /* unreferenced: specular */, 
@@ -67,14 +67,14 @@ public:
 	void DeleteCompiledGeometry( RageCompiledGeometry* );
 
 protected:
-	void DrawQuadsInternal( const RageSpriteVertex v[], int iNumVerts ) { }
-	void DrawQuadStripInternal( const RageSpriteVertex v[], int iNumVerts ) { }
-	void DrawFanInternal( const RageSpriteVertex v[], int iNumVerts ) { }
-	void DrawStripInternal( const RageSpriteVertex v[], int iNumVerts ) { }
-	void DrawTrianglesInternal( const RageSpriteVertex v[], int iNumVerts ) { }
-	void DrawCompiledGeometryInternal( const RageCompiledGeometry *p, int iMeshIndex ) { }
-	void DrawLineStripInternal( const RageSpriteVertex v[], int iNumVerts, float LineWidth ) { }
-	void DrawSymmetricQuadStripInternal( const RageSpriteVertex v[], int iNumVerts ) { }
+	void DrawQuadsInternal( const RageSpriteVertex v[], int /* iNumVerts */ ) { }
+	void DrawQuadStripInternal( const RageSpriteVertex v[], int /* iNumVerts */ ) { }
+	void DrawFanInternal( const RageSpriteVertex v[], int /* iNumVerts */ ) { }
+	void DrawStripInternal( const RageSpriteVertex v[], int /* iNumVerts */ ) { }
+	void DrawTrianglesInternal( const RageSpriteVertex v[], int /* iNumVerts */ ) { }
+	void DrawCompiledGeometryInternal( const RageCompiledGeometry *p, int /* iMeshIndex */ ) { }
+	void DrawLineStripInternal( const RageSpriteVertex v[], int /* iNumVerts */, float /* LineWidth */ ) { }
+	void DrawSymmetricQuadStripInternal( const RageSpriteVertex v[], int /* iNumVerts */ ) { }
 
 	VideoModeParams m_Params;
 	RString TryVideoMode( const VideoModeParams &p, bool & /* bNewDeviceOut */ ) { m_Params = p; return RString(); }
diff --git a/src/RageFileBasic.h b/src/RageFileBasic.h
index 75cff97cc6..7f3a44f9e9 100644
--- a/src/RageFileBasic.h
+++ b/src/RageFileBasic.h
@@ -98,7 +98,7 @@ public:
 	virtual RageFileBasic *Copy() const { FAIL_M( "Copying unimplemented" ); }
 
 protected:
-	virtual int SeekInternal( int iOffset ) { FAIL_M( "Seeking unimplemented" ); }
+	virtual int SeekInternal( int /* iOffset */ ) { FAIL_M( "Seeking unimplemented" ); }
 	virtual int ReadInternal( void *pBuffer, size_t iBytes ) = 0;
 	virtual int WriteInternal( const void *pBuffer, size_t iBytes ) = 0;
 	virtual int FlushInternal() { return 0; }
diff --git a/src/RageFileDriverDeflate.h b/src/RageFileDriverDeflate.h
index cc312b2ad8..92c7d57533 100644
--- a/src/RageFileDriverDeflate.h
+++ b/src/RageFileDriverDeflate.h
@@ -16,7 +16,7 @@ public:
 	RageFileObjInflate( const RageFileObjInflate &cpy );
 	~RageFileObjInflate();
 	int ReadInternal( void *pBuffer, size_t iBytes );
-	int WriteInternal( const void *pBuffer, size_t iBytes ) { SetError( "Not implemented" ); return -1; }
+	int WriteInternal( const void * /* pBuffer */, size_t /* iBytes */ ) { SetError( "Not implemented" ); return -1; }
 	int SeekInternal( int iOffset );
 	int GetFileSize() const { return m_iUncompressedSize; }
 	int GetFD() { return m_pFile->GetFD(); }
@@ -47,7 +47,7 @@ public:
 	void DeleteFileWhenFinished() { m_bFileOwned = true; }
 
 protected:
-	int ReadInternal( void *pBuffer, size_t iBytes ) { SetError( "Not implemented" ); return -1; }
+	int ReadInternal( void * /* pBuffer */, size_t /* iBytes */ ) { SetError( "Not implemented" ); return -1; }
 	int WriteInternal( const void *pBuffer, size_t iBytes );
 	int FlushInternal();
 	
diff --git a/src/RageFileDriverSlice.h b/src/RageFileDriverSlice.h
index 2464d221da..4898d87909 100644
--- a/src/RageFileDriverSlice.h
+++ b/src/RageFileDriverSlice.h
@@ -17,7 +17,7 @@ public:
 	void DeleteFileWhenFinished() { m_bFileOwned = true; }
 
 	int ReadInternal( void *pBuffer, size_t iBytes );
-	int WriteInternal( const void *pBuffer, size_t iBytes ) { SetError( "Not implemented" ); return -1; }
+	int WriteInternal( const void * /* pBuffer */, size_t /* iBytes */ ) { SetError( "Not implemented" ); return -1; }
 	int SeekInternal( int iOffset );
 	int GetFileSize() const { return m_iFileSize; }
 	int GetFD() { return m_pFile->GetFD(); }
diff --git a/src/RageTexture.h b/src/RageTexture.h
index 0b81115358..10840c4a82 100644
--- a/src/RageTexture.h
+++ b/src/RageTexture.h
@@ -12,17 +12,17 @@ class RageTexture
 public:
 	RageTexture( RageTextureID file );
 	virtual ~RageTexture() = 0;
-	virtual void Update( float fDeltaTime ) {}
+	virtual void Update( float /* fDeltaTime */ ) {}
 	virtual void Reload() {}
 	virtual void Invalidate() { }	/* only called by RageTextureManager::InvalidateTextures */
 	virtual unsigned GetTexHandle() const = 0;	// accessed by RageDisplay
 
 	// movie texture/animated texture stuff
-	virtual void SetPosition( float fSeconds ) {} // seek
-	virtual void DecodeSeconds( float fSeconds ) {} // decode
-	virtual void SetPlaybackRate( float fRate ) {}
+	virtual void SetPosition( float /* fSeconds */ ) {} // seek
+	virtual void DecodeSeconds( float /* fSeconds */ ) {} // decode
+	virtual void SetPlaybackRate( float ) {}
 	virtual bool IsAMovie() const { return false; }
-	virtual void SetLooping(bool looping) { }
+	virtual void SetLooping(bool) { }
 
 	int GetSourceWidth() const	{return m_iSourceWidth;}
 	int GetSourceHeight() const {return m_iSourceHeight;}
diff --git a/src/ScoreDisplay.h b/src/ScoreDisplay.h
index 73a7713356..34bed24908 100644
--- a/src/ScoreDisplay.h
+++ b/src/ScoreDisplay.h
@@ -13,14 +13,14 @@ class ScoreDisplay : public ActorFrame
 public:
 	virtual void Init( const PlayerState* pPlayerState, const PlayerStageStats* pPlayerStageStats );
 
-	virtual void SetScore( int iNewScore ) {}
+	virtual void SetScore( int ) {}
 	virtual void OnLoadSong() {};
 	/* Notification of a tap note judgment. This *is* called for the head of
 	 * hold notes. */
-	virtual void OnJudgment( TapNoteScore score ) {};
+	virtual void OnJudgment( TapNoteScore ) {};
 	/* Notification of a hold judgment. tscore is the score received for the
 	 * initial tap note. */
-	virtual void OnJudgment( HoldNoteScore score, TapNoteScore tscore ) {};
+	virtual void OnJudgment( HoldNoteScore, TapNoteScore ) {};
 
 protected:
 	const PlayerState* m_pPlayerState;	// needed to look up stats
diff --git a/src/ScoreKeeper.h b/src/ScoreKeeper.h
index a0ea752bc9..53e6ede331 100644
--- a/src/ScoreKeeper.h
+++ b/src/ScoreKeeper.h
@@ -45,14 +45,18 @@ public:
 	virtual void Update( float fDelta ) { }
 
 	// Note that pNoteData will include any transformations due to modifiers.
-	virtual void OnNextSong( int iSongInCourseIndex, const Steps* pSteps, const NoteData* pNoteData ) { };	// before a song plays (called multiple times if course)
+	virtual void OnNextSong( int /* iSongInCourseIndex */, const Steps*, const NoteData* ) { };	// before a song plays (called multiple times if course)
 
 	// HandleTap* is called before HandleTapRow*
-	virtual void HandleTapScore( const TapNote &tn ) { }
-	virtual void HandleTapRowScore( const NoteData &nd, int iRow ) { }
-	virtual void HandleHoldScore( const TapNote &tn ) { }
-	virtual void HandleHoldActiveSeconds( float fMusicSecondsHeld ) { }
-	virtual void HandleHoldCheckpointScore( const NoteData &nd, int iRow, int iNumHoldsHeldThisRow, int iNumHoldsMissedThisRow ) { }
+	virtual void HandleTapScore( const TapNote & ) { }
+	virtual void HandleTapRowScore( const NoteData & /* nd */, int /* iRow */ ) { }
+	virtual void HandleHoldScore( const TapNote & ) { }
+	virtual void HandleHoldActiveSeconds( float /* fMusicSecondsHeld */ ) { }
+	virtual void HandleHoldCheckpointScore(
+		const NoteData & /*nd */,
+		int /* iRow */,
+		int /* iNumHoldsHeldThisRow */, 
+		int /* iNumHoldsMissedThisRow */ ) { }
 	virtual void HandleTapScoreNone() { }
 
 protected:
diff --git a/src/ScoreKeeperNormal.cpp b/src/ScoreKeeperNormal.cpp
index 53a991a01c..59f8cc27b7 100644
--- a/src/ScoreKeeperNormal.cpp
+++ b/src/ScoreKeeperNormal.cpp
@@ -161,7 +161,7 @@ void ScoreKeeperNormal::Load(
 	m_iRoundTo = 1;
 }
 
-void ScoreKeeperNormal::OnNextSong( int iSongInCourseIndex, const Steps* pSteps, const NoteData* pNoteData )
+void ScoreKeeperNormal::OnNextSong( int, const Steps* pSteps, const NoteData* )
 {
 
 	m_bIsBeginner = pSteps->GetDifficulty() == Difficulty_Beginner && !GAMESTATE->IsCourseMode();
diff --git a/src/ScoreKeeperRave.h b/src/ScoreKeeperRave.h
index 6b5473345d..3f8be61e69 100644
--- a/src/ScoreKeeperRave.h
+++ b/src/ScoreKeeperRave.h
@@ -9,11 +9,11 @@ class ScoreKeeperRave : public ScoreKeeper
 {
 public:
 	ScoreKeeperRave( PlayerState *pPlayerState, PlayerStageStats *pPlayerStageStats );
-	void OnNextSong( int iSongInCourseIndex, const Steps *pSteps, const NoteData *pNoteData ) { }
+	void OnNextSong( int /* iSongInCourseIndex */, const Steps *, const NoteData * ) { }
 	void HandleTapScore( const TapNote &tn );
 	void HandleTapRowScore( const NoteData &nd, int iRow );
 	void HandleHoldScore( const TapNote &tn );
-	void HandleHoldActiveSeconds( float fMusicSecondsHeld ) {}
+	void HandleHoldActiveSeconds( float /* fMusicSecondsHeld */ ) {}
 	void HandleTapScoreNone();
 
 protected:
diff --git a/src/ScreenEditMenu.cpp b/src/ScreenEditMenu.cpp
index dba59d48b1..7158061e45 100644
--- a/src/ScreenEditMenu.cpp
+++ b/src/ScreenEditMenu.cpp
@@ -100,7 +100,7 @@ void ScreenEditMenu::HandleScreenMessage( const ScreenMessage SM )
 	ScreenWithMenuElements::HandleScreenMessage( SM );
 }
 
-void ScreenEditMenu::MenuUp( const InputEventPlus &input )
+void ScreenEditMenu::MenuUp( const InputEventPlus & )
 {
 	if( m_Selector.CanGoUp() )
 	{
@@ -109,7 +109,7 @@ void ScreenEditMenu::MenuUp( const InputEventPlus &input )
 	}
 }
 
-void ScreenEditMenu::MenuDown( const InputEventPlus &input )
+void ScreenEditMenu::MenuDown( const InputEventPlus & )
 {
 	if( m_Selector.CanGoDown() )
 	{
@@ -118,7 +118,7 @@ void ScreenEditMenu::MenuDown( const InputEventPlus &input )
 	}
 }
 
-void ScreenEditMenu::MenuLeft( const InputEventPlus &input )
+void ScreenEditMenu::MenuLeft( const InputEventPlus & )
 {
 	if( m_Selector.CanGoLeft() )
 	{
@@ -126,7 +126,7 @@ void ScreenEditMenu::MenuLeft( const InputEventPlus &input )
 	}
 }
 
-void ScreenEditMenu::MenuRight( const InputEventPlus &input )
+void ScreenEditMenu::MenuRight( const InputEventPlus & )
 {
 	if( m_Selector.CanGoRight() )
 	{
@@ -157,7 +157,8 @@ static LocalizedString DELETED_AUTOGEN_STEPS	( "ScreenEditMenu", "These steps ar
 static LocalizedString STEPS_WILL_BE_LOST	( "ScreenEditMenu", "These steps will be lost permanently." );
 static LocalizedString CONTINUE_WITH_DELETE	( "ScreenEditMenu", "Continue with delete?" );
 static LocalizedString ENTER_EDIT_DESCRIPTION	( "ScreenEditMenu", "Enter a description for this edit.");
-void ScreenEditMenu::MenuStart( const InputEventPlus &input )
+
+void ScreenEditMenu::MenuStart( const InputEventPlus & )
 {
 	if( IsTransitioning() )
 		return;
diff --git a/src/ScreenNetworkOptions.cpp b/src/ScreenNetworkOptions.cpp
index 02d6cf4f8e..63600603fe 100644
--- a/src/ScreenNetworkOptions.cpp
+++ b/src/ScreenNetworkOptions.cpp
@@ -150,8 +150,8 @@ void ScreenNetworkOptions::MenuStart( const InputEventPlus &input )
 	}
 }
 
-void ScreenNetworkOptions::ImportOptions( int iRow, const vector<PlayerNumber> &vpns ) { }
-void ScreenNetworkOptions::ExportOptions( int iRow, const vector<PlayerNumber> &vpns ) { }
+void ScreenNetworkOptions::ImportOptions( int /* iRow */, const vector<PlayerNumber> & /* vpns */ ) { }
+void ScreenNetworkOptions::ExportOptions( int /* iRow */, const vector<PlayerNumber> & /* vpns */ ) { }
 
 void ScreenNetworkOptions::UpdateConnectStatus( )
 {
diff --git a/src/ScreenOptions.cpp b/src/ScreenOptions.cpp
index 3e1e126fc6..c8f984a1d1 100644
--- a/src/ScreenOptions.cpp
+++ b/src/ScreenOptions.cpp
@@ -753,7 +753,7 @@ void ScreenOptions::AfterChangeValueOrRow( PlayerNumber pn )
 }
 
 
-void ScreenOptions::MenuBack( const InputEventPlus &input )
+void ScreenOptions::MenuBack( const InputEventPlus & )
 {
 	Cancel( SM_GoToPrevScreen );
 }
diff --git a/src/ScreenOptionsExportPackage.cpp b/src/ScreenOptionsExportPackage.cpp
index 7b003a6529..777c94cd0a 100644
--- a/src/ScreenOptionsExportPackage.cpp
+++ b/src/ScreenOptionsExportPackage.cpp
@@ -88,12 +88,12 @@ void ScreenOptionsExportPackage::ProcessMenuStart( const InputEventPlus &input )
 
 // todo: process menu back in SubGroup mode
 
-void ScreenOptionsExportPackage::ImportOptions( int iRow, const vector<PlayerNumber> &vpns )
+void ScreenOptionsExportPackage::ImportOptions( int /* iRow */, const vector<PlayerNumber> & /* vpns */ )
 {
 
 }
 
-void ScreenOptionsExportPackage::ExportOptions( int iRow, const vector<PlayerNumber> &vpns )
+void ScreenOptionsExportPackage::ExportOptions( int /* iRow */, const vector<PlayerNumber> & /* vpns */ )
 {
 
 }
diff --git a/src/ScreenOptionsManageCourses.cpp b/src/ScreenOptionsManageCourses.cpp
index 40a0bbcdfa..dc6431a6c4 100644
--- a/src/ScreenOptionsManageCourses.cpp
+++ b/src/ScreenOptionsManageCourses.cpp
@@ -213,7 +213,7 @@ void ScreenOptionsManageCourses::MenuSelect( const InputEventPlus &input )
 
 static LocalizedString YOU_HAVE_MAX( "ScreenOptionsManageCourses", "You have %d, the maximum number allowed." );
 static LocalizedString YOU_MUST_DELETE( "ScreenOptionsManageCourses", "You must delete an existing before creating a new." );
-void ScreenOptionsManageCourses::ProcessMenuStart( const InputEventPlus &input )
+void ScreenOptionsManageCourses::ProcessMenuStart( const InputEventPlus & )
 {
 	if( IsTransitioning() )
 		return;
diff --git a/src/ScreenOptionsManageEditSteps.cpp b/src/ScreenOptionsManageEditSteps.cpp
index b4a48702ee..16c20d224f 100644
--- a/src/ScreenOptionsManageEditSteps.cpp
+++ b/src/ScreenOptionsManageEditSteps.cpp
@@ -240,7 +240,7 @@ void ScreenOptionsManageEditSteps::AfterChangeRow( PlayerNumber pn )
 
 static LocalizedString YOU_HAVE_MAX_STEP_EDITS( "ScreenOptionsManageEditSteps", "You have %d step edits, the maximum number allowed." );
 static LocalizedString YOU_MUST_DELETE( "ScreenOptionsManageEditSteps", "You must delete an existing steps edit before creating a new steps edit." );
-void ScreenOptionsManageEditSteps::ProcessMenuStart( const InputEventPlus &input )
+void ScreenOptionsManageEditSteps::ProcessMenuStart( const InputEventPlus & )
 {
 	if( IsTransitioning() )
 		return;
diff --git a/src/ScreenOptionsManageProfiles.cpp b/src/ScreenOptionsManageProfiles.cpp
index adb2cbf917..40331ddac8 100644
--- a/src/ScreenOptionsManageProfiles.cpp
+++ b/src/ScreenOptionsManageProfiles.cpp
@@ -331,7 +331,7 @@ void ScreenOptionsManageProfiles::AfterChangeRow( PlayerNumber pn )
 	ScreenOptions::AfterChangeRow( pn );
 }
 
-void ScreenOptionsManageProfiles::ProcessMenuStart( const InputEventPlus &input )
+void ScreenOptionsManageProfiles::ProcessMenuStart( const InputEventPlus & )
 {
 	if( IsTransitioning() )
 		return;
@@ -392,12 +392,12 @@ void ScreenOptionsManageProfiles::ProcessMenuStart( const InputEventPlus &input
 	}
 }
 
-void ScreenOptionsManageProfiles::ImportOptions( int iRow, const vector<PlayerNumber> &vpns )
+void ScreenOptionsManageProfiles::ImportOptions( int /* iRow */, const vector<PlayerNumber> & /* vpns */ )
 {
 
 }
 
-void ScreenOptionsManageProfiles::ExportOptions( int iRow, const vector<PlayerNumber> &vpns )
+void ScreenOptionsManageProfiles::ExportOptions( int /* iRow */, const vector<PlayerNumber> & /* vpns */ )
 {
 
 }
diff --git a/src/ScreenOptionsMemoryCard.cpp b/src/ScreenOptionsMemoryCard.cpp
index c0bfa6351b..dea7444c81 100644
--- a/src/ScreenOptionsMemoryCard.cpp
+++ b/src/ScreenOptionsMemoryCard.cpp
@@ -187,7 +187,7 @@ void ScreenOptionsMemoryCard::SelectRowWithMemoryCard( const RString &sOsMountPo
 }
 
 static LocalizedString ERROR_MOUNTING_CARD ("ScreenOptionsMemoryCard", "Error mounting card: %s" );
-void ScreenOptionsMemoryCard::ProcessMenuStart( const InputEventPlus &input )
+void ScreenOptionsMemoryCard::ProcessMenuStart( const InputEventPlus & )
 {
 	if( IsTransitioning() )
 		return;
diff --git a/src/ScreenSelectMusic.cpp b/src/ScreenSelectMusic.cpp
index 52e4e7a4f8..f0e1e7b103 100644
--- a/src/ScreenSelectMusic.cpp
+++ b/src/ScreenSelectMusic.cpp
@@ -1493,7 +1493,7 @@ void ScreenSelectMusic::MenuStart( const InputEventPlus &input )
 }
 
 
-void ScreenSelectMusic::MenuBack( const InputEventPlus &input )
+void ScreenSelectMusic::MenuBack( const InputEventPlus & /* input */ )
 {
 	// Handle unselect song (ffff)
 	// todo: this isn't right at all. -aj
diff --git a/src/arch/InputHandler/InputHandler.h b/src/arch/InputHandler/InputHandler.h
index 3564a73552..2afaa75066 100644
--- a/src/arch/InputHandler/InputHandler.h
+++ b/src/arch/InputHandler/InputHandler.h
@@ -38,7 +38,7 @@ public:
 
 	// Override to find out whether the controller is currently plugged in.
 	// Not all InputHandlers will support this.  Not applicable to all InputHandlers.
-	virtual InputDeviceState GetInputDeviceState( InputDevice id ) { return InputDeviceState_Connected; }
+	virtual InputDeviceState GetInputDeviceState( InputDevice /* id */ ) { return InputDeviceState_Connected; }
 
 	/* In Windows, some devices need to be recreated if we recreate our main window.
 	 * Override this if you need to do that. */
diff --git a/src/arch/MemoryCard/MemoryCardDriver.h b/src/arch/MemoryCard/MemoryCardDriver.h
index cc60e313a8..642d5436e3 100644
--- a/src/arch/MemoryCard/MemoryCardDriver.h
+++ b/src/arch/MemoryCard/MemoryCardDriver.h
@@ -96,7 +96,7 @@ protected:
 	virtual void GetUSBStorageDevices( vector<UsbStorageDevice>& vDevicesOut ) { }
 
 	/* Test the device.  On failure, call pDevice->SetError() appropriately, and return false. */
-	virtual bool TestWrite( UsbStorageDevice* pDevice ) { return true; }
+	virtual bool TestWrite( UsbStorageDevice* ) { return true; }
 
 private:
 	vector<UsbStorageDevice> m_vDevicesLastSeen;