I was able to clear gigs of data deleting WMP 11 transcoding files WMP creates to sync with my mp3 player which I have not used latley so no biggy if I create a play list and say no pics and video or let it happen again with the new ones.
Also QuickTime seems to carry a huge massive cache it does not clean out in users either.
Vista SP1.
I would like to see these cleaned with CCleaner too.