Banshee (and other music applications on Ubuntu) is failing to retrieve media information. The specific error is 'Could not fetch track information'. This has happened on my computer and a friend's computer at their place. About a week ago, it was working fine. I'm assuming therefore that something has changed on MusicBrainz that is preventing the media players from contacting it properly. If it isn't your problem and it's some obscure bug on our end, I apologise.