I am still seeing that error for one of my entries. Is it possible to view the database to see the record at the referenced line?
I seem to be having several issues with MusicLobby. I have been struggling with it for a few weeks. I was trying to clean up some of my "various artist" albums and make them display correctly and in many cases MuL doesn't see the tag changes. I have initialized the database several times. Over the past few days it is not finding some of my music when I re-build the database, but after re-scanning 3 to 4 times it usually picks up everything. But now some of the coverart is incorrect even though it has been correct in previous scans over the past several days. Strange stuff.