First start general GNOME3 shortcuts doesn't work

[Hammer Attila]

Hy,

I see following issue since thursday or friday my Precise system, I 
using Precise with GNOME3 fallback session.
I don't no why, but general shortcuts doesn't work. Typical examples are 
ALT+F1, ALT+F2, ALT+TAB, ALT+F4.
Of course, this shortcuts are setted in GNOME Control Center Keyboard 
preference tool/keybindings page.

Attila