Comment 8 for bug 1315425

I can confirm this bug too. But it does not happen everytime, just from time to time.

My System:
OS: Ubuntu 13.10 saucy
Kernel: x86_64 Linux 3.11.0-20-generic
Gnome 3.9.90
WM: GNOME Shell
GTK Theme: Adwaita [GTK2], Adwaita [GTK3]
CPU: Intel Core i5 CPU M 430 @ 2.267GHz
GPU: GeForce GTS 250M
DRIVER: nvidia-304

I'll try to find something interesting in the logs and append it if it occurs the next time.