I very happy with how great CCleaner is working, but there is a extremely annoying thing after it has cleaned up my mac. I'm using Logic Pro and Mainstage 2, and therefore i'm having a lot of plug-ins installed, which in Logic is coded to the Audio Unit type. So when I want to run Logic aften the clean-up then it takes several minuets to scan and relocate all plug-ins. This has led to in my case, that I haven't used CCleaner in which case I wanted, and probably should.
Specs:
MacBook Pro OS X 10.6.8
Intel Core i7
Logic Pro 9.1.7
Mainstage 2.1.3
Steffen