A another day, another browser release. But BEWARE. As Marc Orchant says, Bad Things will happen if you try to install Firefox 1.0.2 over the old version, as the Automatic Updates tells you to. Instead, download it, remove the old version (it should leave your profile intact) then install the new one.
This happened with 1.0.1 as well. Like the long Title popups bug, they really should have fixed this by now.
Interesting. I’ve had no problem with either automatic install, from 1.0.0 to 1.0.1, or 1.0.1 to 1.0.2.