The latest released Emacs version is 22.3 (September 5, 2008). If you’re building Emacs 23 from CVS on a Mac, you may have noticed that non-ASCII keys stopped working correctly. It turns out that ages ago I added the following to my .emacs file:
This is no longer necessary. In fact, it is the cause of the problem with my Umlaut keys. I deleted the line and now I’m back in happy äöü Land.
I guess I added it for CarbonEmacsPackage back in the days.