If you put into your iPod Classic a Various Artist compilation like a Soundtrack or a Greatest Hits ... you'll see in coverflow 1 cover for each song!!! And this makes cover flow a REALLY messy experience!!
If here, anyone found a solution/update to this problem please reply! One of the most beautiful things of the new iPod was the Cover Flow ... but is really full of bug!
Please read this post (iPod Classic - Hiding Compilation Artists):
Here you can send a feedback to the Apple:
hope that someone find a solution i don't think that apple make a new firmware right now ...
PS. Someone can fix my URL? It's important!