I'm experiencing the same bug when composing mail or editing account properties, even with a blank new profile.
Following the instructions on https://wiki.ubuntu.com/MozillaTeam/Bugs #head-523978f1f3009b1b57ef020d5e3ff8674e737f41 (replacing "firefox" by "thunderbird" of course) I created the attached file gdb.log which hopefully is of some help. ** Attachment added: "gdb.log" http://launchpadlibrarian.net/9197125/gdb.log -- [GUTSY] thunderbird crashed x86-64 https://bugs.launchpad.net/bugs/135191 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