I'm not quite sure why, but after I upgraded to IOS4, several of my albums had split, at least according to the album artwork view. I would see 2 identical albums, each with the exact same songs. All the information was identical(album, artist, year, etc.), including case/punctuation/spacing. I am very anal about my tags, and being an iPod/iPhone user since their release, I have encountered every possible problem that would cause the same album to be in more than one location, so I was quite confused, and searching for a fix yielded nothing. I did come up with my own fix while messing around. Simply highlight all the songs, rename the album to something completely different, and then back to the original album name. Voilà.