The Dangers of Updating Mac OS X Software

“Updating prebinding has a very, very nasty bug in it… If multiple processes are updating prebinding at the same time, then it is possible for a system file to be completely zero’d out. “

The Dangers of Updating: Don’t Do Anything While Optimizing - The Unofficial Apple Weblog (TUAW)

I don’t feel like testing this one out but the post by Rosyna on unsanity.org has all the gory details.

Best to close applications down when running software update just to be safe! Pretty disappointing bug though.