Yeah, BPM segments, big one :D

src/ScreenSyncOverlay.cpp

@@ -222,7 +222,7 @@ bool ScreenSyncOverlay::OverlayInput( const InputEventPlus &input )
 			if( GAMESTATE->m_pCurSong != NULL )
 			{
 				BPMSegment& seg = GAMESTATE->m_pCurSong->m_SongTiming.GetBPMSegmentAtBeat( GAMESTATE->m_Position.m_fSongBeat );
-				seg.m_fBPS += fDelta;
+				seg.SetBPS( seg.GetBPS() + fDelta );
 			}
 		}
 		break;