I go to Browse>Artists>USSR Ministry of Culture Chamber Choir, Valery Polyansky conducting and I get "Can't load Browse Data". The same tune, selected by Browse>Song or Browse>Album works fine.
I go to Browse>Artists>Russian State Symphony Capella, Valery Polyansky conducting and this tune works fine (as do other long-named-but-shorter-than-64-or-so-characters artists)
I haven't tested to see if it's exactly 64 chars that makes the diff, but figure that is the over/under point for whether this work or not.
Serving a SoundBridge M500 (and an untested M1000) with mt-daapd on Ubuntu Hoary.
I realize this could be an mt-daapd limitation - will eventually test that theory as well.