polymorphic_url with map.resource rails 2.3

rubyonrails-talk
1

In a rails 2.3 app when i do a polymorphic_url with a model that is mapped with map.resource instead of map.resources I am getting a funky url

"http://test.host/first_aider.%23<firstaider:0xb6f12578>&quot;

where I want http://test.host/first_aider

is there a valid way to do this

cheers

Stephen