Whenever Mozilla finishes a page load, it steals window focus. This is bad because - I might not want it to do such a thing - I might be typing a password in a terminal or dialog - there is no workaround in Sawfish, AFAICS, besides "don't browse while you're doing anything else"
It's a known bug.
They claim it's just been fixed in mozilla-trunk. Hope fully we'll see it soon in the next release.
Yeah, it should show up in 0.9.2.1/0.9.3.
FWIW, fixed in 0.9.4 at least. (I've had bad experience with 0.9.3.)
Fixed in rawhide.