I can confirm this bug.
OS: Ubuntu 13.04 Kernel: 3.8.0-30-generic Desktop Environment: XFCE 4.10, but it also occurs when I start a Gnome or Unity Session.
I can confirm this bug.
OS: Ubuntu 13.04
Kernel: 3.8.0-30-generic
Desktop Environment: XFCE 4.10, but it also occurs when I start a Gnome or Unity Session.