Disgaea deleting it's save file by itself.

I get the same thing on NO$GBA 2.6a

It's only during the cutscenes though, and usually clears up after the opening FMV. Half the screen is covered by two black bars. It wasn't hurting the gameplay, so I left it alone and continued to play. I figured it was just something that would need to be fixed in the next in the next NO$GBA release.