I have a controller called 'exposures' which I created automatically with the script/generate scaffold call.  The scaffold pages work fine.  I created a custom action called 'test' in the exposures controller.  When I try to call the page (http://127.0.0.1:3000/exposures/test/1) I get a blank, white screen with no text at all in the source.  
I am using Rails 2.3.8 and mongrel in the development environment.  There are no entries in development.log and the console that was used to open mongrel has the following error:
  You might have expected an instance of
  Array. The error occurred while
  evaluating nil.split
  D:/Rails/ruby/lib/ruby/gems/1.8/gems/actionpack-2.3.8/lib/action_controller/cgi_process.rb:52:in
  dispatch_cgi'
  D:/Rails/ruby/lib/ruby/gems/1.8/gems/actionpack-2.3.8/lib/action_controller/dispatcher.rb:101:in
  dispatch_cgi'
  D:/Rails/ruby/lib/ruby/gems/1.8/gems/actionpack-2.3.8/lib/action_controller/dispatcher.rb:27:in
  dispatch'
  D:/Rails/ruby/lib/ruby/gems/1.8/gems/mongrel-1.1.2-x86-mswin32/bin/../lib/mongrel/rails.rb:76:in
  process'
  D:/Rails/ruby/lib/ruby/gems/1.8/gems/mongrel-1.1.2-x86-mswin32/bin/../lib/mongrel/rails.rb:74:in
  synchronize'
  D:/Rails/ruby/lib/ruby/gems/1.8/gems/mongrel-1.1.2-x86-mswin32/bin/../lib/mongrel/rails.rb:74:in
  process'
  D:/Rails/ruby/lib/ruby/gems/1.8/gems/mongrel-1.1.2-x86-mswin32/bin/../lib/mongrel.rb:159:in
  process_client'
  D:/Rails/ruby/lib/ruby/gems/1.8/gems/mongrel-1.1.2-x86-mswin32/bin/../lib/mongrel.rb:158:in
  each'
  D:/Rails/ruby/lib/ruby/gems/1.8/gems/mongrel-1.1.2-x86-mswin32/bin/../lib/mongrel.rb:158:in
  process_client'
  D:/Rails/ruby/lib/ruby/gems/1.8/gems/mongrel-1.1.2-x86-mswin32/bin/../lib/mongrel.rb:285:in
  run'
  D:/Rails/ruby/lib/ruby/gems/1.8/gems/mongrel-1.1.2-x86-mswin32/bin/../lib/mongrel.rb:285:in
  initialize'
  D:/Rails/ruby/lib/ruby/gems/1.8/gems/mongrel-1.1.2-x86-mswin32/bin/../lib/mongrel.rb:285:in
  new'
  D:/Rails/ruby/lib/ruby/gems/1.8/gems/mongrel-1.1.2-x86-mswin32/bin/../lib/mongrel.rb:285:in
  run'
  D:/Rails/ruby/lib/ruby/gems/1.8/gems/mongrel-1.1.2-x86-mswin32/bin/../lib/mongrel.rb:268:in
  initialize'
  D:/Rails/ruby/lib/ruby/gems/1.8/gems/mongrel-1.1.2-x86-mswin32/bin/../lib/mongrel.rb:268:in
  new'
  D:/Rails/ruby/lib/ruby/gems/1.8/gems/mongrel-1.1.2-x86-mswin32/bin/../lib/mongrel.rb:268:in
  run'
  D:/Rails/ruby/lib/ruby/gems/1.8/gems/mongrel-1.1.2-x86-mswin32/bin/../lib/mongrel/configurator.rb:282:in
  run'
  D:/Rails/ruby/lib/ruby/gems/1.8/gems/mongrel-1.1.2-x86-mswin32/bin/../lib/mongrel/configurator.rb:281:in
  each'
  D:/Rails/ruby/lib/ruby/gems/1.8/gems/mongrel-1.1.2-x86-mswin32/bin/../lib/mongrel/configurator.rb:281:in
  run'
  D:/Rails/ruby/lib/ruby/gems/1.8/gems/mongrel-1.1.2-x86-mswin32/bin/mongrel_rails:128:in
  run'
  D:/Rails/ruby/lib/ruby/gems/1.8/gems/mongrel-1.1.2-x86-mswin32/bin/../lib/mongrel/command.rb:212:in
  run'
  D:/Rails/ruby/lib/ruby/gems/1.8/gems/mongrel-1.1.2-x86-mswin32/bin/mongrel_rails:281
  D:/Rails/ruby/bin/mongrel_rails:19:in
  load'
  D:/Rails/ruby/bin/mongrel_rails:19
Here is the exposures_controller code:
class ExposuresController < ApplicationController
  # GET /exposures
  # GET /exposures.xml
  def index
    @exposures = Exposure.all
respond_to do |format|
  format.html # index.html.erb
  format.xml  { render :xml => @exposures }
end
end
#/exposure/graph/1
  def graph
   @exposure = Exposure.find(params[:id])
   project_name = @exposure.tender.project.name
   group_name = @exposure.tender.user.group.name
   tender_desc = @exposure.tender.description
   direction = "Cash Out"
   direction = "Cash In" if @exposure.supply
   currency_1_and_2 = "#{@exposure.currency_in} = #{@exposure.currency_out}"
   title = "#{project_name}:#{group_name}:#{tender_desc}/n"
   title += "#{direction}:#{currency_1_and_2}"
   factors = Array.new
   carrieds = Array.new
   days = Array.new
   @exposure.rates.each do |r|
    factors << r.factor
    carrieds << r.carried
    days << r.day.to_s
   end
   max = (factors+carrieds).max
   min = (factors+carrieds).min
g = Graph.new
   g.title(title, '{font-size: 12px;}')
   g.set_data(factors)
   g.line_hollow(2, 4, '0x80a033', 'Bounces', 10)
   g.set_x_labels(days)
   g.set_x_label_style( 10, '#CC3399', 2 );
   g.set_y_min(min*0.9)
   g.set_y_max(max*1.1) 
   g.set_y_label_steps(5)
   render :text = g.render
  end
def test
   render :text = "this works"
  end
# GET /exposures/1
  # GET /exposures/1.xml
  def show
    @exposure = Exposure.find(params[:id])
    @graph = open_flash_chart_object(700,250, "/exposures/graph/#{@exposure.id}")
    #@graph = "/exposures/graph/#{@exposure.id}"
respond_to do |format|
  format.html # show.html.erb
  format.xml  { render :xml => @exposure }
end
end
# GET /exposures/new
  # GET /exposures/new.xml
  def new
    @exposure = Exposure.new
respond_to do |format|
  format.html # new.html.erb
  format.xml  { render :xml => @exposure }
end
end
# GET /exposures/1/edit
  def edit
    @exposure = Exposure.find(params[:id])
  end
# POST /exposures
  # POST /exposures.xml
  def create
    @exposure = Exposure.new(params[:exposure])
respond_to do |format|
  if @exposure.save
    flash[:notice] = 'Exposure was successfully created.'
    format.html { redirect_to(@exposure) }
    format.xml  { render :xml => @exposure, :status => :created, :location => @exposure }
  else
    format.html { render :action => "new" }
    format.xml  { render :xml => @exposure.errors, :status => :unprocessable_entity }
  end
end
end
# PUT /exposures/1
  # PUT /exposures/1.xml
  def update
    @exposure = Exposure.find(params[:id])
respond_to do |format|
  if @exposure.update_attributes(params[:exposure])
    flash[:notice] = 'Exposure was successfully updated.'
    format.html { redirect_to(@exposure) }
    format.xml  { head :ok }
  else
    format.html { render :action => "edit" }
    format.xml  { render :xml => @exposure.errors, :status => :unprocessable_entity }
  end
end
end
# DELETE /exposures/1
  # DELETE /exposures/1.xml
  def destroy
    @exposure = Exposure.find(params[:id])
    @exposure.destroy
respond_to do |format|
  format.html { redirect_to(exposures_url) }
  format.xml  { head :ok }
end
end
end
Clever readers will notice the 'graph' action. This is what I really want to work, but if I can't even get the test action working, then I'm sure I have no chance. 
Any ideas?  I have restarted mongrel a few times with no change.
Here is the output of Rake routes (but I don't believe this is the problem. The error would be in the form of and HTML error response).
D:\Rails\rails_apps\fxrake routes
(in D:/Rails/rails_apps/fx)
DEPRECATION WARNING: Rake tasks in vendor/plugins/open_flash_chart/tasks are deprecated. Use lib/tasks instead. (called from D:/
by/gems/1.8/gems/rails-2.3.8/lib/tasks/rails.rb:10)
        rates GET    /rates(.:format)                   {:controller="rates", :action="index"}
              POST   /rates(.:format)                   {:controller="rates", :action="create"}
     new_rate GET    /rates/new(.:format)               {:controller="rates", :action="new"}
    edit_rate GET    /rates/:id/edit(.:format)          {:controller="rates", :action="edit"}
         rate GET    /rates/:id(.:format)               {:controller="rates", :action="show"}
              PUT    /rates/:id(.:format)               {:controller="rates", :action="update"}
              DELETE /rates/:id(.:format)               {:controller="rates", :action="destroy"}
      tenders GET    /tenders(.:format)                 {:controller="tenders", :action="index"}
              POST   /tenders(.:format)                 {:controller="tenders", :action="create"}
   new_tender GET    /tenders/new(.:format)             {:controller="tenders", :action="new"}
  edit_tender GET    /tenders/:id/edit(.:format)        {:controller="tenders", :action="edit"}
       tender GET    /tenders/:id(.:format)             {:controller="tenders", :action="show"}
              PUT    /tenders/:id(.:format)             {:controller="tenders", :action="update"}
              DELETE /tenders/:id(.:format)             {:controller="tenders", :action="destroy"}
    exposures GET    /exposures(.:format)               {:controller="exposures", :action="index"}
              POST   /exposures(.:format)               {:controller="exposures", :action="create"}
 new_exposure GET    /exposures/new(.:format)           {:controller="exposures", :action="new"}
edit_exposure GET    /exposures/:id/edit(.:format)      {:controller="exposures", :action="edit"}
     exposure GET    /exposures/:id(.:format)           {:controller="exposures", :action="show"}
              PUT    /exposures/:id(.:format)           {:controller="exposures", :action="update"}
              DELETE /exposures/:id(.:format)           {:controller="exposures", :action="destroy"}
   currencies GET    /currencies(.:format)              {:controller="currencies", :action="index"}
              POST   /currencies(.:format)              {:controller="currencies", :action="create"}
 new_currency GET    /currencies/new(.:format)          {:controller="currencies", :action="new"}
edit_currency GET    /currencies/:id/edit(.:format)     {:controller="currencies", :action="edit"}
     currency GET    /currencies/:id(.:format)          {:controller="currencies", :action="show"}
              PUT    /currencies/:id(.:format)          {:controller="currencies", :action="update"}
              DELETE /currencies/:id(.:format)          {:controller="currencies", :action="destroy"}
     projects GET    /projects(.:format)                {:controller="projects", :action="index"}
              POST   /projects(.:format)                {:controller="projects", :action="create"}
  new_project GET    /projects/new(.:format)            {:controller="projects", :action="new"}
 edit_project GET    /projects/:id/edit(.:format)       {:controller="projects", :action="edit"}
      project GET    /projects/:id(.:format)            {:controller="projects", :action="show"}
              PUT    /projects/:id(.:format)            {:controller="projects", :action="update"}
              DELETE /projects/:id(.:format)            {:controller="projects", :action="destroy"}
       groups GET    /groups(.:format)                  {:controller="groups", :action="index"}
              POST   /groups(.:format)                  {:controller="groups", :action="create"}
    new_group GET    /groups/new(.:format)              {:controller="groups", :action="new"}
   edit_group GET    /groups/:id/edit(.:format)         {:controller="groups", :action="edit"}
        group GET    /groups/:id(.:format)              {:controller="groups", :action="show"}
              PUT    /groups/:id(.:format)              {:controller="groups", :action="update"}
              DELETE /groups/:id(.:format)              {:controller="groups", :action="destroy"}
        users GET    /users(.:format)                   {:controller="users", :action="index"}
              POST   /users(.:format)                   {:controller="users", :action="create"}
     new_user GET    /users/new(.:format)               {:controller="users", :action="new"}
    edit_user GET    /users/:id/edit(.:format)          {:controller="users", :action="edit"}
         user GET    /users/:id(.:format)               {:controller="users", :action="show"}
              PUT    /users/:id(.:format)               {:controller="users", :action="update"}
              DELETE /users/:id(.:format)               {:controller="users", :action="destroy"}
                     /:controller/:action/:id
                     /:controller/:action/:id(.:format)
D:\Rails\rails_apps\fxrails -v
Rails 2.3.8
Thanks in advance for the help
-Jon