Under Ubuntu 6.10 Thunderbird 1.5.0.9 the Ctrl-Z option seems to be masked. I have to use "Edit->Undo Delete" from the menu.
I couldn't add a bug, rather I entered a support request about the matter here on launchpad. https://answers.launchpad.net/thunderbird/+ticket/3829 -- crash while undo of of delete operation https://launchpad.net/bugs/74952 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
