Firefox 1.5.0.5 was released today and every Firefox user should update today.
I have updated the ua sidebar to include the new user agent strings for those of you who are still doing user agent string browser detection.
I have also blocked access to this site and the archive for users of out of date versions of Firefox (who have JavaScript enabled). If you notice that an up to date Gecko-based browser is incorrectly blocked, please contact me and let me know the details including the user agent string.
/bc