RORails :: Stylesheet

I had a problem with the CSS Stylesheet

Order of events

- file style.css created 

- file is saved in public/stylesheets/ folder

- below line included in layout page.

 <%= stylesheet_link_tag "style", :media => "all" %>

- It worked first time, but then when i refresh the page, 

the error was something like this,

=============================

ERROR NoMethodError: private method `gsub!' called for #
    /usr/lib/ruby/1.8/webrick/htmlutils.rb:16:in `escape'
    /usr/lib/ruby/1.8/webrick/httpresponse.rb:232:in `set_error'
    /home/krevanna/Public/MBAP/vendor/rails/railties/lib/webrick_server.rb:94:in `handle_file'
    /home/krevanna/Public/MBAP/vendor/rails/railties/lib/webrick_server.rb:73:in `service'
    /usr/lib/ruby/1.8/webrick/httpserver.rb:104:in `service'
    /usr/lib/ruby/1.8/webrick/httpserver.rb:65:in `run'
    /usr/lib/ruby/1.8/webrick/server.rb:173:in `start_thread'
    /usr/lib/ruby/1.8/webrick/server.rb:162:in `start'
    /usr/lib/ruby/1.8/webrick/server.rb:162:in `start_thread'
    /usr/lib/ruby/1.8/webrick/server.rb:95:in `start'
    /usr/lib/ruby/1.8/webrick/server.rb:92:in `each'
    /usr/lib/ruby/1.8/webrick/server.rb:92:in `start'
    /usr/lib/ruby/1.8/webrick/server.rb:23:in `start'
    /usr/lib/ruby/1.8/webrick/server.rb:82:in `start'
    /home/krevanna/Public/MBAP/vendor/rails/railties/lib/webrick_server.rb:60:in `dispatch'
    /home/krevanna/Public/MBAP/vendor/rails/railties/lib/commands/servers/webrick.rb:66
    /usr/lib/ruby/1.8/rubygems/custom_require.rb:31:in `gem_original_require'
    /usr/lib/ruby/1.8/rubygems/custom_require.rb:31:in `require'
    /home/krevanna/Public/MBAP/vendor/rails/activesupport/lib/active_support/dependencies.rb:153:in `require'
    /home/krevanna/Public/MBAP/vendor/rails/activesupport/lib/active_support/dependencies.rb:521:in `new_constants_in'
    /home/krevanna/Public/MBAP/vendor/rails/activesupport/lib/active_support/dependencies.rb:153:in `require'
    /home/krevanna/Public/MBAP/vendor/rails/railties/lib/commands/server.rb:49
    /usr/lib/ruby/1.8/rubygems/custom_require.rb:31:in `gem_original_require'
    /usr/lib/ruby/1.8/rubygems/custom_require.rb:31:in `require'
    script/server:3
127.0.0.1 - - [06/Jun/2010:12:57:41 CDT] "GET /stylesheets/style.css?1275762019 HTTP/1.1" 500 343
Referer -> /stylesheets/style.css?1275762019
=================================

- This totally takes of the css from the page.

- there is this number associated after the style.css page i am not sure why is this, and what it means

- I tried changing the setting with the cache, but didnt work

- i am still not sure whats causing this problem.

I think it was something to do with WebBrick, so i changed the server gem to mongrel

$ sudo gem install mongrel

$ ruby script/server mongrel
- now it all worked good for me.