I know the latest releases have had some slight VGA bugs (menu bar in the middle, etc...), and I can't reproduce the bug on emulator so it has been kind of a pain for me to test... Anyways, here's a version I'd like to submit : http://www.xflib.net/Files/BlackFlipVGA.zip
Changed a few lines of code in XFlib for managing fullscreen, I really hope this fixes it, but as I can't test myself... Can't be sure ^^ Thanks for testing (anyone who has the bug in SkinzSudoku/BlackFlip/PocketGravity) and tell me if it's better