Ubuntu
thunderbird package

  1. Bug #1234468
  2. Comment #11

Comment 11 for bug 1234468

Revision history for this message
In , Bugzilla-g (bugzilla-g) wrote :

Andrew, do you by any chance have unclutter running?

https://forum.kde.org/viewtopic.php?f=111&t=117704&p=294916#p294912