Having the same issue. When I try the "ee site edit mysite.com" I just get an almost empty screen, just with a number like 479, and the editor does not respond to the keyboard.
Same happens here http://community.rtcamp.com/t/ee-site-edit-domain-com-with-nano-and-putty/2858 and gau1991 told us that it had a fix, but I've totally installed a fresh installation with all the updates and the erros stays. 
When I edit with nano without ee like "nano file.ext" it works great.