Just a quick note…wanted to post it in case anybody else was having the same trouble. I was trying to find a way to get sublime to allow repeated characters in Mac OS Lion / Mountain Lion when you hold down a key on the keyboard (ApplePressAndHoldEnabled) and most of the documentation tells you how to do it in Sublime Text 2.
defaults write com.sublimetext.2 ApplePressAndHoldEnabled -bool false
If you simple change the com.sublimetext.2 to com.sublimetext.3 like so:
defaults write com.sublimetext.3 ApplePressAndHoldEnabled -bool false
This will allow the setting to work on the new Sublime Text 3 beta.