I had the same problem. It was due to sound alerts. I disabled "Play a sound" "When new messages arrive" (Preferences -> General), my thunderbird works now properly.
-- mozilla-thunderbird freezes after downloading mail https://bugs.launchpad.net/bugs/58008 You received this bug notification because you are a member of Ubuntu Bugs, which is the bug contact for Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
