@Codemattic, yea I'm pretty sure I did that update a month or so ago? Noticed slightly less fan usage & heat I think.
Half of the issues probably my fault, as I don't reboot for days or longer, and usually have between 20-50 firefox tabs open whilst developing, and various programs like photoshop, flash etc all running. So running the simulator on top of that, seems to push my mbp into overdrive :-/
Its not much of an issue, unless I'm trying to fix/tweak something that makes me 'build & go' multiple times in the space of a few mins.
Thanks for the tip though.