I can confirm this bug on an up-to-date Jaunty installation. Not surprisingly this bug also affects Mozilla Thunderbird.The workaround suggested by the OP works.
-- with multiple-monitors, firefox menus/url history/tooltips shows up on wrong monitor https://bugs.launchpad.net/bugs/295192 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs