Mechanize users - Sep 2009 - Handling form fields with "." in them?

Hi,

Upon re-installing mechanize on a new machine, I found that the API had 
changed, and I''m having trouble figuring out how to upgrade my script
to
account for the new changes.

The following used to work:

        page = @agent.get ''http://www.example.com''
        login_form = page.forms.with.name("loginForm").first
        login_form.fields.name("mbr.loginID").value= 
CONFIG[''example''][''login'']
        
login_form.fields.name("mbr.password").value=CONFIG[''example''][''password'']
        page = @agent.submit(login_form)
        return page

This is what I think the new script should be:

        page = login_page.form_with(:name => "loginForm") do |f|
            f.mbr.loginID = 
CONFIG[''example''][''login'']
            f.mbr.password =
CONFIG[''example''][''password'']
        end.submit

However, I get the following error:

/usr/local/lib/ruby/gems/1.8/gems/visionmedia-commander-3.2.9/lib/commander/user_interaction.rb:101:in
`method_missing'': undefined method `mbr'' for 
#<WWW::Mechanize::Form:0x2ab9e04> (NoMethodError)

The . in the field name appears to be interpreted as a method 
indicator.  What would be the best way of referencing and assigning 
values to the form fields name "mbr.loginID" and
"mbr.password"?

Thanks! 

Chris