Holding down a key on the keyboard does not cause it to repeat correctly. The key will repeat, but only after 2 seconds or so. In some cases it doesn't repeat at all. There are a few suggestions floating around in forums but none seem to correct the problem.
Settings in preferences are ignored:
Interestingly, key repeat does seem to work in Terminal, but that's the exception. It's broken in Notes, Mail, TextEdit, etc.
Any ideas?