I have been a long term user of SuperDuper and recommend it to all my friends and clients.
I just installed a new Western Digital 320gb HD in my PowerBook Pro (doubling my previous storage capacity), but I spent many hours trying to figure out why my SD clone copy wouldn't boot. I never suspected the problem was an incompatibility with the Leopard OS and SD because SD seemed to run fine after installing Leopard a couple of months ago.
Of course, I should have checked your website sooner. But after reading about SD's problem with Leopard, I was able to get my new internal drive up and running again copying the old drive with Carbon Copy Cloner:
www.bombich.com/software/ccc.html
Since CCC doesn't do incremental back ups, this just a temporary solution. So an update to SD will be appreciated when available.
Thanks, Chaim