thank you for your bug report, that was a regression in the proposed update version of gtk you are using: libgtk-3-0 3.4.2-0ubuntu0.1
the issue got fixed on monday in that following update: https://launchpad.net/ubuntu/+source/gtk+3.0/3.4.2-0ubuntu0.2
see bug #1001229 for details about the issue, you should upgrade and restart your session
thank you for your bug report, that was a regression in the proposed update version of gtk you are using: libgtk-3-0 3.4.2-0ubuntu0.1
the issue got fixed on monday in that following update: https:/ /launchpad. net/ubuntu/ +source/ gtk+3.0/ 3.4.2-0ubuntu0. 2
see bug #1001229 for details about the issue, you should upgrade and restart your session