I am having an occasional problem in iTunes where my main screen (songs, movies, TV shows, podcasts etc.) is totally blank (as in solid white) and when I change it to visual effects, iPod control screen or iTunes Store, and then go back to the main screen, it retains what was on it. I had the problem twice, the first time I solved it by replacing iTunes.app by the iTunes.app in my backup folder, the second time by reinstalling iTunes. No real damage was done, but it's pretty annoying. I don't use any mods or plugins that would cause this. does this sound familiar to anyone?