Theres also an upstream bug report: https://bugzilla.mozilla.org/show_bug.cgi?id=1151764
So maybe its an issue with thunderbird (xfwm4 was also suggested). However, since some themes do work, adjusting the others may be the easiest way to fix this. ** Bug watch added: Mozilla Bugzilla #1151764 https://bugzilla.mozilla.org/show_bug.cgi?id=1151764 -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1526345 Title: *bird themes break adress autocompletion in thunderbird To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/shimmer-themes/+bug/1526345/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs