i have a few keys that i prefer to force-bind to keys i'm familiar with, and so i have used this SO Solution .
but i have found recently that it breaks for me.
the circumstances: it works fine when running 24.2.1 in window mode as build 2012-08-27 on bob.parkland.org (i.e. the pre-build emacs-for-mac solution found at http://emacsformacosx.com/).
but then it will not work when run in terminal on lion, which is 22.1.1 (mac-apple-darwin) of 2012-01-12 on b1006.apple.com .
if i comment out the call to add the hook, it works fine.