FireFox vs Internet Explorer

Firefox passed internet explorer for the past week on one of my sites, http://www.gpfbg.com (a forum in Bulgarian, about the get-paid-to-business).
The stats, provided by Google analytics show that 52.3% of the visitors for the past week (12.14.2006-12.20.2006) viewed the site through Firefox.
Internet explorer holds 37.7%, and the remaining 10% are divided by other browsers (opera, netscape, safari, etc).
Take that, Micro$oft.