I ripped some of my CD's to mp3, and also put some of my mp3's, which I had purchased from my Zune account, into my Ubuntu One Cloud. Most of them show up with the correct album art and album/artist names, but random songs will be sent to the unknown album/artist folders.
I have been trying to get this to work right for over a month and I believe I am giving the app/cloud plenty of time to refresh and categorize my music (sometimes I'll wait a week).
In my attempts to debug this I have removed all of my music from my cloud several times and have re-uploaded my music. I also tried uninstalling the apps on my ipad and Iphone.
It seems that some songs that were recognized previously will not be recognized and vice versa after the re-upload. And even some songs that I don't upload again still show up in the unknown album/artist list, i.e. not go away.
This is frustrating because I like to be able to click on an album and listen to it straight through without searching for some random missing song in the unknown listing. This seems like a serious bug. If it isn't please help me figure it out.