FF 3.0.8 has been released. Personally, just as at the last update,
I had much trouble trying to go along with the automatic update,
and finally just downloaded the whole thing manually and installed.
EDIT: "fixes two critical security issues found in Firefox 3.0.7"
Firefox web browser
Added May 1: I should have remembered long ago to add this comment,
for completeness. The reason I had trouble with the automatic update is
almost certainly that I normally run Firefox with lowered (not administrator)
privileges (using the DropMyRights script). Otherwise, I have no trouble
with the automatic updating. Sorry I'm so tardy with this.