My machine CANNOT download Security Update 1.0; see the screenshot for the error message (it generates just as the download completes). Any suggestions?
Got it. Everything's up and running. I didn't even have to quit my other programs to install these UNIX files, much less reboot. It's nice to see Apple's really taking advantage of what OS X can do in this area.
Good to hear; and about not having to reboot, it's definitely nice.
However, as I mentioned in the announcement for the update, it doesn't restart sshd, so uncheck/recheck Allow remote login if you have it turned on.