HS + Pageroute compatibility

Hi,

I have a form with two taxonomy fields using the hierarchical select widget. When I use the form alone, everything works ok. But if I include the form as a page in a pageroute, the hierarchical select stops to work. It displays ok, but if I try to select something it displays the message "Received an invalid response from the server".

Don't know if it helps, but using Firebug and FirePHP, I found that it seems to be building the form twice. Inside hierarchical select there is an #after_build callback that sets an hs_form_build_id property on the form. In standalone forms, this callback is called once, and the id is correct. Inside of a pageroute, the callback is called twice: in the first one the id is generated, but not in the second.

Any ideas of what could be the problem?

Thanks in advance!