Very interesting and Shirt Pocket Software is to be commended for discovering and, as JChusi pointed out, correcting in the SuperDuper 2.6.2 update.

However, what happens with Carbon Copy Cloner, Time Machine, Silverkeeper, et. al. — even drag and drop copies of compressed files remains an open question. confused I wonder too about disk space allocation when compressed files are copied to the iDisk. confused With a 50th anniversary party staring me in the face this Friday, it is safe to say my wife is not going to allow me time to experiment with this, but hopefully someone else will have sufficient intellectual curiosity and time to test using other copy methods.

I look forward to seeing the results of such testing.

If we knew what it was we were doing, it wouldn't be called research, would it?

— Albert Einstein