When using viewports with the MPV that don't cover the entire screen, when the MPV transitions to an operational state the splash screen will remain on the screen unless covered by a viewport.
Attached is a patch to clear the screen when transitioning to operate which resolves the problem. It does unfortunately cause a brief flicker of the CIGI logo as the IG transitions between Operate => Load Database => Operate again since it clears the screen twice here (which is probably less than ideal).
Bug affects MPV 2.0.0 and current svn.
mpv-2.0.0+clear_splash_screen_on_operate.diff
Updating my hack for the latest svn in case anyone needs it =)
File Added: mpv-r451+clear_splash_screen_on_operate.diff
updated OpenGL hack to fix bug =)