Just to mention that I used CCC to make a clone of my drive before I upgrade it. I didn't test it much (my bad) before moving back the data. It was booting, everything was there so I changed the hard drive. But when I booted from the clone, no application would launch... I mean none. Safari, Terminal, Disk Utility, photoshop, etc.
In the end, it was caused by a corrupted preference file of "plugsuit". Don't know if CCC caused this but in one way, it was working before and after it wasn't.
http://discussions.apple.com/thread....07109&tstart=0
So I would say SuperDuper FTW (I never used it). Just sayin...