Url_for, form_remote_tag when rendered from an ajax referenc

I’ve done this a hundred times in other places in my code but it seems
that
this has suddenly broken. I can replicate it on my coworkers
computer…
I’m generating a form_remote_tag from within a partial as so:

<% form_remote_tag(:update => ‘acct_balance’,
:url => ‘/report/ajax_get_balance’,
:html => {:name => ‘update_balance’, :id =>
‘update_balance’}) do -%>

<% end -%>

When rendering this non-ajax, it generates the URL for form_remote_tag
correctly…

When Rendering this through an Ajax call in which case render :partial
is
called from same action, , I’m receiving:

undefined method rewrite' for #<String:0x366c7a0> /opt/local/lib/ruby/gems/1.8/gems/actionpack-1.13.3/lib/action_controller/base.rb:522:inurl_for’
/opt/local/lib/ruby/gems/1.8/gems/actionpack-1.13.3/lib/action_view/helpers/url_helper.rb:27:in
url_for' /opt/local/lib/ruby/gems/1.8/gems/actionpack-1.13.3/lib/action_view/helpers/url_helper.rb:75:inlink_to’

in url_for in base.rb, this is doing:

@url.rewrite

however in this case @url.rewrite is a string when it is nromally a
UrlRewrite object so @url.rewrite fails…

Anyone have this problem? Running

lemming:/Users/sblackstone/development/rwjf root# rails -v
Rails 1.2.3

Thanks!

Stephen