Displaying validates_acceptance_of Errors In A Check Box


I am having trouble displaying a check box which must be checked but hasn't been. I would like it to be highlighted as in a scaffolded view but the hidden check box field which is generated by the check_box helper is also highlighted, and the text next to it loses its styling.

My code follows. Should I get cleverer with the CSS or write my own check_box helper which wouldn't wrap both the visible and the hidden check boxes in <div class='fieldWithError' /> tags -- or something else altogether?

In my customer model I have:

   validates_acceptance_of :terms

In my view I have:

<% form_for :customer, @customer, :url => { :action => :store } do |c> %>
   <p><%= c.check_box :terms %> I have read and agree to the Software Licence Agreement.</p>
   <%= submit_tag %>
<% end %>

When the user submits the form without ticking the box, the view renders again with erroneous fields highlighted as in a scaffolded view.

The HTML generated for the check box is:

<p><div class="fieldWithErrors"><input id="customer_terms" name="customer[terms]" type="checkbox" value="1" /></div><div class="fieldWithErrors"><input name="customer[terms]" type="hidden" value="0" /></div> I have read and agree to the Software Licence Agreement.</p>

The CSS is:

.fieldWithErrors {
  border: 1px solid red;
  padding: 2px;
  display: inline;

And the result unfortunately is that both the visible and invisible check boxes are given a border and the text ("I have read....") loses the styling for <p/> tags.

Thanks in advance,

Andy Stewart