Alt in OSX Terminal gets eaten/confused -- can't use screen.

http://blog.remibergsma.com/2012/01/30/alt-key-aan-de-praat-in-osx-terminal/

• Go to terminal (menu at the top)
• preferences
• themes
• click the keyboard tab (why are keyboard settings under themes apple?)
• choose 'use option as meta key' -- why they can't call it the alt key I don't understand either!

Enjoy your restored functionality and sanity.