When you are in 16bit color depth mode, ALT-TAB out and then ALT-TAB back to the game, then you will find that it has switched to 32bit color depth. This can also happen when you return from the video driver settings dialog. Note that this problem was also present in the vanilla version.
As a workaround, the DirectDraw display mode is not reset when the rendering target is destructed in the current "forced window mode".
When you are in 16bit color depth mode, ALT-TAB out and then ALT-TAB back to the game, then you will find that it has switched to 32bit color depth. This can also happen when you return from the video driver settings dialog. Note that this problem was also present in the vanilla version. As a workaround, the DirectDraw display mode is not reset when the rendering target is destructed in the current "forced window mode".