Rails app using prototype defaults & jquery(1.0.3) - Rails' text_field_with_auto_complete works in FF(1.5 & 2) but not in IE(6 or 7).

In order to isolate the problem, I created a simple Rails app as follows:

++++++++++++++++++++++++++++

Controller: (test_controller.rb)

class TestController < ApplicationController

auto_complete_for :item, :name

def index

end

end

View: (index.rhtml)

<%= text_field_with_auto_complete :item, :name %>

In the layout (test.rhtml) I added

<%= javascript_include_tag "prototype" %>

<%= javascript_include_tag "controls" %>

<%= javascript_include_tag "effects" %>

<%= javascript_include_tag "jquery" %>

Once jquery is added, the auto complete breaks in IE6 & IE7, but works fine in FF1.5 & FF2.