I also got this when trying to play/use rhythmbox as well.
(rhythmbox:21159): RhythmDB-CRITICAL **: rhythmdb_entry_ref: assertion `entry != NULL' failed
(rhythmbox:21159): RhythmDB-CRITICAL **: rhythmdb_entry_get_ulong: assertion `entry != NULL' failed
lots of times as well.
I also got this when trying to play/use rhythmbox as well.
(rhythmbox:21159): RhythmDB-CRITICAL **: rhythmdb_entry_ref: assertion `entry != NULL' failed
(rhythmbox:21159): RhythmDB-CRITICAL **: rhythmdb_ entry_get_ ulong: assertion `entry != NULL' failed
lots of times as well.