"More than 1300 software testers from 68 countries
recently participated in uTest's Battle of the Browsers
competition. The uTest community found:
672 overall bugs
101 "showstopper" bugs, which are flaws that need immediate
attention
"So which Web browser was the buggiest? Apparently, Firefox 3.1
-- though it’s important to note that Firefox had the most
number of testers hunting bugs during the contest. In theory, the
more testers you have the more bugs you'll find. Here are some
quick stats on each browser:"