I am not sure how to google for this problem.
I recently upgrade OS:X and had a crash and I lost the ability to do my alt4 shortcut to move spaces. I instead get the ¢ character.
My shortcut setting is set in preferences:
I am not sure where to override the (new) keyboard shortcut for the ¢ key. The other shortcuts for spaces work (ie switching to desktop 1-3).
This was working prior to a system crash.
I have re-added my keyboard that I am using, which does not fix the problem. I have the same problem on my built-in keyboard as well as my USB keyboard.