respond_to rails 2.3.2 broken

guys, after i upgraded my project from rails 2.2.2 to 2.3.2 the form_remote_tag i use to update a div stopped to work in some web browsers (it only works on firefox now - no ie7, ie8, chrome or opera) it continues to send the request and receives the response but the div's contents doesn't change. when i submit the form the values change correctly.

view:

<%= render(:partial => "telefone_do_clientes", :object => @telefone_do_clientes) %>

<%= submit_tag "Adicionar Telefone" %>

<% end %>

controller: def adiciona_telefone [...]

respond_to { |format| format.js }

end

i used respond_to this way since 2.0.x and it worked fine, i read that the new 2.3 version changed a lot of this method, can you verify this? when i force version 2.2.2 on my env conf file, it works! thanks