Same for me, everything ran great until I upgrade to Raring from 12.x Firefox 20.0, Thunderbird 17.0.5
The only thing I recall about upgrading is that new nVidia drivers were install during the upgrade. I was not using Oxygen GTK theme, I was using the Air Black Remix for Window Decorations and Glassified for desktop theme. Switched both anyway to see if that helps. -- You received this bug notification because you are a member of Desktop Packages, which is subscribed to firefox in Ubuntu. https://bugs.launchpad.net/bugs/963736 Title: thunderbird freezes at random : must be killed and reload Status in “firefox” package in Ubuntu: Confirmed Status in “thunderbird” package in Ubuntu: Confirmed Bug description: Thunderbird freezes at random. I must kill it then reload it. Sometimes the freeze happens when sending a mail. I had no problem in 11.10. It happens several times a day. The only pattern that I can currently see is that the freeze happens frequently when thunderbird is using the network. $ lsb_release -rd Description: Ubuntu precise (development branch) Release: 12.04 $ dpkg-query -s thunderbird Package: thunderbird Status: install ok installed Priority: optional Section: mail Installed-Size: 45256 Maintainer: Ubuntu Mozilla Team <[email protected]> Architecture: amd64 Version: 11.0+build1-0ubuntu1 [...] To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/firefox/+bug/963736/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : [email protected] Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp

