It's definitely this one which breaks it: http://hg.mozilla.org/releases/mozilla-1.9.2/rev/bb935ffe5ff1
When running the first iteration of the loop in nsCookieService::CountCookiesFromHostInt, (nextDot <= end && *(nextDot + 1) == '\0') always evaluates to true, so it just bails out -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/801778 Title: Regression: Firefox 3.6.18 do not set cookie when talking to single letter hostname To manage notifications about this bug go to: https://bugs.launchpad.net/firefox/+bug/801778/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs