I'm on a Ubuntu 13.04 machine with MATE 1.7 installed. I'm trying to open the keyboard shortcuts menu, but nothing happens.
Anyway, I can reach it through:
system option -> keyboard -> shortcuts
Last week, I added a shortcut
gnome-screenshot -a -c but it doesn't work anymore. So, I discover that my shortcut disappears from the menu and when I try to add it again, it doesn't work neither.
I also tried to add more shortcuts, not only those of
gnome-screenshot, but no one works.