I had an application that was prompting a HTTP Authentication box in IE after using the restful authentication plugin. The way I fixed it was to replace the access_denied method in lib/authenticated_system.rb to:
def access_denied respond_to do |format| format.any do #format.html do store_location redirect_to new_session_path end #format.any do # request_http_basic_authentication 'Web Password' #end end end
Noticed I commented some lines out. This was so that if i ever need to revert, the code will still be there and I wont have to go looking for it. Hope this helps!