I had some graphics issues earlier today.. I randomly opened a few games and I noticed little glitchy dots all over my screen. So I closed and reopened the game, same thing. So I started opening other games, same thing. I eventually restarted the pc and it fixed itself. lol
As far as this goes however, I have no idea. But at least it isn't corrupting the pictures themselves, and the only person that see's it is you. Since it's just the menu, it probably doesn't matter too much, unless that is- you want a nice looking main menu..