I found a workaround. A backtrace in gdb showed, that libflashplayer has something to do with the crashes. After uninstalling Flashplayer, I can write emails again. Maybe it is already enough to deactivate the plugin /add-ons. I attach the backtrace.
** Attachment added: "backtrace.txt" https://bugs.launchpad.net/ubuntu/+source/thunderbird/+bug/1315289/+attachment/4103165/+files/backtrace.txt -- You received this bug notification because you are a member of Desktop Packages, which is subscribed to thunderbird in Ubuntu. https://bugs.launchpad.net/bugs/1315289 Title: Thunderbird 24.5.0 on Ubuntu 13.10 crashes when opening a new mail Status in “thunderbird” package in Ubuntu: New Bug description: That also happens in "-safe-mode", here is some debug info I found: ... [New Thread 0x7fffb8bff700 (LWP 24589)] [New Thread 0x7fffde124700 (LWP 24592)] Program received signal SIGBUS, Bus error. memset () at ../sysdeps/x86_64/multiarch/../memset.S:554 554 ../sysdeps/x86_64/multiarch/../memset.S: Datei oder Verzeichnis nicht gefunden. ... To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/thunderbird/+bug/1315289/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : desktop-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp
