It has a description which seems... potentially ominous:
"This update is for Mac Pro (Early 2009) computers running Mac OS X v10.6.2. This update reduces processor utilization during audio activities, such as playing or recording music."

This seems like the kind of update Apple occasionally throws out that could mess with things DP doesn't want messed with.
Anyone just go ahead and install this?
Bad/good/no experiences to report?