Yes, I see what you see: the borders around the tabs are missing. Not just on the Security prefpane, on all of them, that have tabs.
But that's all that's wrong. (Or at least all that's obviously wrong.) So while I can corroborate you, I think it's a different error and should have a separate bug report. This bug was for the whole user interface falling apart, rendering the application unusable, and has been fixed. -- 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/1721189 Title: Thunderbird 1:52.4.0+build1-0ubuntu1 broken user interface Status in thunderbird package in Ubuntu: Confirmed Bug description: Just received the update 1:52.4.0+build1-0ubuntu1 which has a broken user interface. See attached screenshot. Downgraded to thunderbird_52.3.0+build1-0ubuntu0.17.04.1_amd64.deb which solved the problem. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/thunderbird/+bug/1721189/+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
