Do you have a Mac Pro from early 2009? Have you noticed that there’s a bizarre noise coming from inside of your Mac Pro when you try and use firewire based audio equipment? Yeah, us neither, but apparently it was a problem that needed fixing.
Apple released Audio Update 1.1 today. The problem was introduced with the 1.0 Audio Update that was released in February. If you’re not sure what we’re talking about the problem probably doesn’t apply to you, but you may want to check your software update just to be sure.