See Bug #10905 (https://bugs.launchpad.net/ubuntu/+source/gtk+2.0/+bug/10905) It seems a X11 bug (or a design choice, someone said).
See Bug #10905 (https:/ /bugs.launchpad .net/ubuntu/ +source/ gtk+2.0/ +bug/10905)
It seems a X11 bug (or a design choice, someone said).