Rails - Sep 2005 - Getting validates_presence_of() to render a partial

How can I get the validates_presence_of() on a validation error  
render a partial instead of looking for a full action template.

I get the following error:
ActionController::MissingTemplate (Missing template ./script/../ 
config/..//app/views//listings/newReview.rhtml):

for the following methods:

class ListingsController < ApplicationController

def newReview
     @review = Review.new
      render(:partial => ''newReview'')
  end

def createReview
     @review = Review.new(params[:review])
     @review.listing = @session[:listing]
     if @review.save
       flash[:notice] = ''Review was successfully created''
       render(:partial => ''showReview'', :id => @review)
     else
       render(:action => ''newReview'')
     end
end

end

being used with form_remote_tag() to update a multi-part submission.  
This works great unless I use validates_presence_of() in the Review  
model which errors trying to render a full template instead of re- 
rendering the newReview() partial.

Thanks

Andrew