Keyboard shortcut doesn't work
I'm a big fan of setting up keyboard shortcuts (System Preferences: Keyboard: Keyboard Shortcuts).
I'm editing a large file in Pages (latest version '09 v4.2) and wanted a keyboard shortcut for Insert: Page Break. I successfully added it to my MacBook Air (all my Macs are running 10.7.4), and it works perfectly.
But when I went to add it to my MacPro tower (same versions and OS), it doesn't work. It shows up successfully in Keyboard Shortcuts (see attached image), with no warning icon next to it, and I've looked to find out if if the Command-Shift-Return is used in any other app. Still, it doesn't work; when I try it in Pages, I just get the System's beep noise, telling me 'no compute.'
I've restarted, double checked updates, deleted the shortcut, even tried other shortcuts, verified there are no spaces before or after the shortcut name.
Any other ideas?
2.66Ghz Mac Pro, Mac OS X (10.7), 11 gigs of Ram, MacBook Pro, MBA