Re-enabling Key Repeat in OSX Lion | Belchak.com:

I have recently upgraded to OSX Lion, and I have to say that I love everything about it. Except for one thing. In many apps, the key repeat has been disabled in favor of the new press-and-hold popup for getting alternative characters.

Run the following in your Terminal.app:

defaults write -g ApplePressAndHoldEnabled -bool false



Seems like there's got to be a better way in the System Prefs, but thank heavens. I can use VIm again, specifically IdeaVIM in PhpStorm.