I doesn't seem to happen again since I upgraded to firefox 10.0.2+build1-0ubuntu0.11.10.1. Still, I have a wireshark capture showing the issue.
** Changed in: firefox (Ubuntu) Status: New => Fix Released -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/923531 Title: firefox is warning about untrusted connection but certificate is valid To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/firefox/+bug/923531/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs