acts_as_ferret multi model search

Hello,

I'm using acts_as_ferret plugin for the search function of my
application. My app contains two model, one Address model and one
Contact model with both acts_as_ferret enabled.

When I try to do a query on both of Contact and Address Model, it
seems that the plugin (0.4.3) only do the search on the first one
(Contact) :

@search_results = Contact.find_with_ferret("*zu*", {:multi =>
[Address]})

Hope somebody can help me. Regards