It is fixed now in vivid. A possible workaround if you run a pre-vivid version is here: https://bugs.launchpad.net/ubuntu/+source/ubuntu-ui-toolkit/+bug/1400297/comments/4
It is fixed now in vivid. A possible workaround if you run a pre-vivid version is here: https:/ /bugs.launchpad .net/ubuntu/ +source/ ubuntu- ui-toolkit/ +bug/1400297/ comments/ 4