Interesting. Our music server in the basement can’t stay up and running for more than a day without disappearing off the network completely; some sleuthing reveals the iTunes (10.5) database getting is continually getting corrupted. This drives me nuts and Jen even nuttier—she’s the one working from home. Apple’s boards are predictably quiet about my problem, so I had to do some heavy Google-fu to find answers elsewhere. This one looks promising: Deleting the Genius database.. The author goes on to suggest turning Genius off completely, because it seems to the the root of iTunes evil. So I know what I’m trying this evening.