Q:

Keyboard shortcuts not working in gnome-shell 3.2? 

I was wondering if keyboard shortcuts (like Alt+F1, Alt+F2) support is removed from gnome shell 3.2? 
If not then I'm missing something as I can't seem to use them. 

A:

ok so by default Alt+F2 doesn't work in gnome shell [source: http://www.webupd8.org/2011/10/things-to-tweak-after-installing-ubuntu.html] 
 Here is solution they have provided:

To fix it, open "System Settings" and under Keyboard > Shortcuts > System, click "Disabled" next to "Show the run command prompt" and press Alt + F2 - this should set Alt + F2 for running the command prompt.