Undefined Method: `downcase'

[LiamGoodacre]

Initial searching works fine, but I can go Next or Previous (or provide any input after the initial launch). I get the following error:

/Library/Ruby/Gems/1.8/gems/google-1.0.10/lib/google.rb:83:in input': undefined methoddowncase' for 10:Fixnum (NoMethodError)
from /Library/Ruby/Gems/1.8/gems/google-1.0.10/lib/google.rb:68:in display_serp' from /Library/Ruby/Gems/1.8/gems/google-1.0.10/lib/google.rb:25:insearch'
from /Library/Ruby/Gems/1.8/gems/google-1.0.10/bin/google:32
from /usr/bin/google:19:in `load'
from /usr/bin/google:19

System: Mac OS X 10.7.4
I ran a gem update before installing.