hmm, puzzling.
I vaguely seem to remember seeing that update come through with the others yesterday when I was rebuilding my rMBP, but it all works fine for me - which isn't a lot of help to you I know.
and I don't suppose repairing permissions or resetting the nvram would fix it on yours?
I had an issue on the wife's Air recently, started up from Recovery Disk on a usb stick and repaired permissions from there.
restarted as per normal and everything's been fine since