I've had a quick look and I think this is a tRio problem. For some reason I'm specifying the artist name as a regular expression. I can't remember if there was a reason for this, but I'll switch the RE bit off and see what happens.

Unfortunately I'm right in the middle of making major changes for UPnP at the moment, so I won't be able to give you a fix for a few weeks yet.

Cheers
Paul