Comment 13 for bug 147270

The music disappearing bug is pretty well documented guys, It's a regression caused by fixing a bug with the Columns for artist, album, title, etc. in the playlist. All you have to do is Go to View->Columns and re-enable them. Also with version control software (like Bazaar) every single change made to any of the code is reversible, so any problems with an update can be rolled back.