> The corruption problems came from students seeing that only PNGs/JPGs were allowed, then trying to "convert" the file just by renaming it. I mean ... isn't

> The corruption problems came from students seeing that only PNGs/JPGs were allowed, then trying to "convert" the file just by renaming it. I mean ... isn't that kind of a classic trick when handing in homework you didn't make? Just rename some file to .doc and claim it got corrupted?