Tried the Combo twice on a new (May 2010) iMac. Got the Combo (977.xx MBs) from the Apple site. After about 200 MBs of the download, Safari declares: "Can't mount the .dmg". What's that all about?

Am going to use the Delta.

That's an odd one.

For what it's worth, I d/l'ed directly from Apple and installed with no issues (so far).