FastCGI and Apache. Anybody know what can cause this error?

Does anybody know what could possibly be causing my error?

Somehow action_controller got into a state where it was retuning not
found for about 4 out of every 5 requests, seemingly arbitrarily.

Has anybody else ever experienced this? I’ve heard that apache and
fastcgi is not the best solution, do you think this is fcgi’s fault?
Could it be a bug in my ruby code? Could it be a bug in my version of
rails?

Restarting my site via:
touch dispatch.fcgi
seemed to do the trick

Here’s the error:

Processing SiteController#show_page (for 74.94.128.241 at 2007-03-01
13:58:26) [POST]
Parameters: {“action”=>“show_page”, “url”=>[“portfolio”, “design”,
“print”, “fibonaccis-spirals-in-nature”], “controller”=>“site”}

ActionController::UnknownAction (No action responded to show_page):
/usr/lib/ruby/gems/1.8/gems/actionpack-1.12.5/lib/action_controller/filters.rb:368:in
perform_action_without_benchmark' /usr/lib/ruby/gems/1.8/gems/actionpack-1.12.5/lib/action_controller/benchmarking.rb:69:inperform_action_without_rescue’
/usr/lib/ruby/1.8/benchmark.rb:293:in measure' /usr/lib/ruby/gems/1.8/gems/actionpack-1.12.5/lib/action_controller/benchmarking.rb:69:inperform_action_without_rescue’
/usr/lib/ruby/gems/1.8/gems/actionpack-1.12.5/lib/action_controller/rescue.rb:82:in
perform_action' /usr/lib/ruby/gems/1.8/gems/actionpack-1.12.5/lib/action_controller/base.rb:408:insend’
/usr/lib/ruby/gems/1.8/gems/actionpack-1.12.5/lib/action_controller/base.rb:408:in
process_without_filters' /usr/lib/ruby/gems/1.8/gems/actionpack-1.12.5/lib/action_controller/filters.rb:377:inprocess_without_session_management_support’
/usr/lib/ruby/gems/1.8/gems/actionpack-1.12.5/lib/action_controller/session_management.rb:117:in
process' /usr/lib/ruby/gems/1.8/gems/rails-1.1.6/lib/dispatcher.rb:38:indispatch’
/usr/lib/ruby/gems/1.8/gems/rails-1.1.6/lib/fcgi_handler.rb:150:in
process_request' /usr/lib/ruby/gems/1.8/gems/rails-1.1.6/lib/fcgi_handler.rb:54:inprocess!’
/usr/lib/ruby/1.8/fcgi.rb:600:in each_cgi' /usr/lib/ruby/1.8/fcgi.rb:597:ineach’
/usr/lib/ruby/1.8/fcgi.rb:597:in each_cgi' /usr/lib/ruby/gems/1.8/gems/rails-1.1.6/lib/fcgi_handler.rb:53:inprocess!’
/usr/lib/ruby/gems/1.8/gems/rails-1.1.6/lib/fcgi_handler.rb:23:in
`process!’
dispatch.fcgi:24