I observed this bug in the previous LTS release (12.04?) and I confirm it is still here in Ubuntu 14.04.1 (Thunderbird 31.2.0).
System details: x86_64 nvidia graphics, nouveau driver KDE enviroment Happened in both Thunderbird and Firefox in Ubuntu 12.04. Under 14.04.1, I observed this bug in Thunderbird but not (yet?) in Firefox. Don't know how to reproduce it reliably, but it happens sufficiently often to be annoying. When it happens, I usually force a window refresh by switching to another (fullscreen) window and back. -- 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/1301225 Title: Parts of Text disappear in Firefox and Thunderbird Editors /Text Areas Status in firefox package in Ubuntu: Confirmed Status in thunderbird package in Ubuntu: Confirmed Bug description: System info: Firefox 28 Thunderbird 24.4.0 Ubuntu 13.10 64 bit When I edit text in Firefox or Thunderbird, parts of this text (usually entire rows above the cursor) seem to disappear while I type. This happens e.g. when I edit an email message inThunderbird, or edit a Jira comment or a Wikipedia page in Firefox. Sometimes the 'opposite' happens, i.e. a row is copied, so it is shown twice. The text is not really gone; I can restore it by selecting it (e.g. with Ctrl-a). I.e. only the text display is affected. The behavior is not quite reproducible. It does happen frequently, but I can't reproduce it exactly by typing the same text again. I had never observed this behavior before the latest Firefox upgrade. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/firefox/+bug/1301225/+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

