banshee --debug
[Debug 21:41:03.945] Configuration client extension loaded (Banshee.GnomeBackend.GConfConfigurationClient)
[Debug 21:41:04.265] NDesk.DBus.Bus.Session.RequestName ('org.bansheeproject.Banshee') => PrimaryOwner
[Debug 21:41:04.274] Core service started (DBusServiceManager, 0.254094s)
[Debug 21:41:04.659] Core service started (DbConnection, 0.382994s)
[Debug 21:41:05.013] Core service started (SourceManager, 0.017534s)
[Debug 21:41:05.018] Core service started (ProfileManager, 0.004238s)
[Debug 21:41:05.146] Core service started (PlayerEngine, 0.127686s)
[Debug 21:41:05.150] Core service started (PlaybackController, 0.002375s)
[Debug 21:41:05.150] Core service started (ImportSourceManager, 0.00024s)
[Debug 21:41:05.159] Core service started (LibraryImportManager, 0.008426s)
[Debug 21:41:05.162] Core service started (UserJobManager, 0.002116s)
[Debug 21:41:05.186] Core service started (HardwareManager, 0.023183s)
[Debug 21:41:05.291] Core service started (GtkElementsService, 0.10397s)
[Debug 21:41:05.403] Core service started (InterfaceActionService, 0.111907s)
[Debug 21:41:05.406] Core service started (ArtworkManager, 0.002114s)
[Debug 21:41:06.381] Core service started (NereidPlayerInterface, 0.974553s)
[Debug 21:41:06.394] Using GNOME 2.20 API for Multimedia keys
[Debug 21:41:06.394] Extension service started (MultimediaKeysService, 0.012803s)
[Debug 21:41:06.508] Extension service started (DaapService, 0.112918s)

Now clicking a song from the migrated db makes it play, but I also get this for every song:

[Warn  21:42:34.878] Failed to update metadata for 3 Doors Down - This Time (on Away From The Sun) <00:05:19> [file:///home/laxee/media/music/Michee's%20Music/ogg/3_Doors_Down/3_Doors_Down_-_Away_From_The_Sun_-_12_-_This_Time.ogg] - System.DllNotFoundException

[Debug 21:42:39.442] TrackInfoDisplay RenderAnimation: 19.00 FPS