I have about 13GB of music on my SD card. A few of the albums show up as "Unkown artist" (everything else is correct: song name, album name, album art). It is kind of annoying. Anyone else have this problem. I have spent a lot of time tagging my music. I know my music is tagged correctly b/c it works just fine in Winamp, iTunes, iPod, Songbird, etc. Please Help!