custom error pages-- which exceptions to catch?

Hi all,

I implemented custom 404 and 500 error pages using rescue_from
according to an example I found at
http://blog.ubrio.us/code/rails-22-custom-error-pages-with-exception-loggable/

Here's my version:

  unless ActionController::Base.consider_all_requests_local
    rescue_from ActiveRecord::RecordNotFound,
ActionController::RoutingError, ActionController::UnknownController,
ActionController::UnknownAction, :with => :render_404
    rescue_from RuntimeError, :with => :render_500
  end

  def render_500
    render :template => "errors/error_500", :layout =>
'singlecolumn', :status => 500
  end

  def render_404
    respond_to do |type|
      type.html { render :template => "errors/error_404", :layout =>
'singlecolumn', :status => 404 }
      type.all { render :nothing => true, :status => 404 }
    end
    true # so we can do "render_404 and return"
  end

Then I went to test it, by sticking a call to the undefined name
"foobar" at the top of my homepage action. This raised a NameError,
which wasn't caught by my 500 error catcher. Now, I can just add the
error to the list, but I'm curious about other exceptions that could
be raised that I haven't anticipated. When implementing custom error
pages, which exceptions do folks like to catch?

Rafe Rosen
Common Media, Inc.
http://www.commonmediainc.com