Keyboard shortcut for applications menu

[Alexander Smirnov]

Constantinos Maltezos wrote:
> Sorry, didn't see this before.
>
> Rather than changing it, try deleting it, applying the change, then setting it 
> up again.  I had a recent problem with layout switching that doing this fixed.
thanks Constantinos for the reply.

the problem was auto-solved, probably after reboot.
I will try your method if I face this again :)