Hopefully this may help someone else who is equally as clueless as myself on all Mac or OSX things (Im a pc youth victim recently rehabilitated )
My 1 yo mbp was heating up and dock had almost 100% cpu usage with no apps running - I closed down windows 7 and parallels 6 - still 100% cpu from dock. found this link to fix it.
Thanks to the original post above - helped heaps
Now its 0.1% dock cpu usage - Fixed
Screenshot before fix (sorry wont display the tiff screen grab - reason as per first line of this post :)