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.
Raphael Supports Firefox 3.0+, Safari 3.0+, Opera 9.5+ and Internet Explorer 6.0+ which is pretty awesome and allows you to do almost any graphic task you have in mind, just check the demos.
Raphael weighs about 110kb uncompressed, which is kind of an issue i think.
Get it here at the Raphael Homepage
You're seeing this error because I think it is funny.