Verified fixed on Debian GNU/Linux with:
Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.9.1b1pre) Gecko/20080926211849 Minefield/3.1b1pre Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.9.1b1pre) Gecko/20080929020532 Minefield/3.1b1pre
as opposed to Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.9.1b1pre) Gecko/20080924020520 Minefield/3.1b1pre
Verified fixed on Debian GNU/Linux with:
Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.9.1b1pre) Gecko/200809262 11849 Minefield/3.1b1pre 20532 Minefield/3.1b1pre
Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.9.1b1pre) Gecko/200809290
as opposed to 20520 Minefield/3.1b1pre
Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.9.1b1pre) Gecko/200809240