No, this is not a real Sinatra error :).
This is the personal homepage of Elad Meidar, a web developer and an entrepreneur specializing in Ruby on Rails. I hang around in Israel, and i am currently having the best time of my life over at Fiverr.com
I am a proud member of RailsBridge, Helping new Rails developers get into our world and also contributed a few Patches to the Ruby on Rails core.
I fear the rails community is getting closer and closer to fulfill my vision of
YouveGotRails.com allows one to generate a rails application with plugins and gems of choice, along side some extra configuration options (Git and Capistrano Initialization).
You're seeing this error because I think it is funny.