500 Internal Server Error

Accept-Charset encoding error (CGI::InvalidEncoding)

/home/kamino/env/lib/ruby/1.9.1/cgi/core.rb:666:in `block (2 levels) in initialize_query'
/home/kamino/env/lib/ruby/1.9.1/cgi/core.rb:661:in `each'
/home/kamino/env/lib/ruby/1.9.1/cgi/core.rb:661:in `block in initialize_query'
/home/kamino/env/lib/ruby/1.9.1/cgi/core.rb:660:in `each'
/home/kamino/env/lib/ruby/1.9.1/cgi/core.rb:660:in `initialize_query'
/home/kamino/env/lib/ruby/1.9.1/cgi/core.rb:817:in `initialize'
/home/kamino/www/vh_knonline_net/d/tdiary/dispatcher.rb:36:in `new'
/home/kamino/www/vh_knonline_net/d/tdiary/dispatcher.rb:36:in `send_headers'
index.rb:34:in `<main>'