xServe G4 has lots of them That was last machine I ran 10.5 server on(work).

using the separate downloaded combo update for the server so I can monitor what's going on sitting at 44C, some times shows 45C, but not for long. with 68% processor average. maybe it was just the software update version had an issue? so far so good (tried it again through software update and it locked up at the same point)