I’ve got similar problem on nightlies 1376. mt-daapd is installed on a G3 running OSX server 10.4. Tried on a Mac mini running iTunes 7.01 and a PC running iTunes 6.04.
Nightlies 1376 would serve tunes for 2 hours or so, then it suddenly halted and dispeared from the iTunes sidebar. I check the log but found nothing relevant. Stable 0.24 works flawlessly in the same setup.