There was a short thread in March 08 about how the format param is always reset to fbml, preventing the use of respond_to (http://rubyforge.org/pipermail/facebooker-talk/2008-March/000464.html). I am experiencing this issue now. As a matter of taste I would rather use formatted_..._url(:format => :json) and respond_to do |format| format.json { ... } end over request.xhr?. Is this just not possible with Facebooker? Alan. -- <a href="http://wikimediafoundation.org/wiki/Donate/en"><img border="0" alt="Wikipedia Affiliate Button" src="http://upload.wikimedia.org/wikipedia/foundation/5/58/2008_fundraiser_micro_button-en.png" /></a>