Cannot select host

[jravetch]

When running ec2ssh, my instances are displayed, but I get the following error:

Host? /Library/Ruby/Gems/1.8/gems/highline-1.6.2/lib/highline.rb:608:in get_line': The input stream is exhausted. (EOFError) from /Library/Ruby/Gems/1.8/gems/highline-1.6.2/lib/highline.rb:629:inget_response'
from /Library/Ruby/Gems/1.8/gems/highline-1.6.2/lib/highline.rb:216:in ask' from /Library/Ruby/Gems/1.8/gems/EC2ssh-0.1.6/lib/ec2ssh.rb:33:inselect_instance'
from /Library/Ruby/Gems/1.8/gems/EC2ssh-0.1.6/bin/ec2ssh:17
from /usr/bin/ec2ssh:19:in `load'
from /usr/bin/ec2ssh:19