Seriously, Ubuntu, upgrading between versions has become just painful… I waited a few weeks before I upgraded from Xubuntu 11.10 to 12.04 because the upgrade last time completely hosed my system and left me with a borked X configuration. This time, I upgraded and now all my keyboard shortcuts don’t work. None of them. I mean, they appear in my Keyboard Settings –> Application Shortcuts, but none of them work anymore. Seriously, WTF.
Turns out that the issue is that (for some stupid reason), XFCE changed the name of the <Ctrl> key to “Primary”, so you need to go to Accessories –> Settings Manager –> Keyboard –> Application Shortcuts and then remove all your custom shortcuts that show <Control> in them and re-add them. You’ll notice that when you press the Ctrl key, it will now show up as <Primary>. Completely retarded.