Handling Errors + Attachment_Fu

Hi people, with the attachment_fu plugin, how can i handle things when
errors occur with an image upload, so the user doesn't see a blank
screen on the production site.

?

Also in general how should I be handling form submit errors, I'm
using...

  def signup
    return unless request.post?
    begin
      ...
      #redirect to homepage if all ok
      redirect_back_or_default(:action => 'profile')

    rescue ActiveRecord::RecordInvalid
      #if not, redirect to signup page with message
      flash[:notice] = "Sorry, something went wrong"
      render :action => 'signup'
    end
  end

Did some research, found some decent tutorials...

http://www.railsonwave.com/railsonwave/2007/1/19/howto-raise-and-rescue-exceptions-in-ruby-on-rails

http://wiki.rubyonrails.com/rails/pages/HandlingPreControllerErrors

http://wiki.rubyonrails.com/rails/pages/HowtoSendEmailWhenRailsThrowsAnException

http://wiki.rubyonrails.org/rails/pages/HowtoConfigureTheErrorPageForYourRailsApp

going to implement the email-on-error one, would help out a lot when
things don't go completely to plan.