Mine

<!-----------------------------------------------------------------------------------
Reid, the problem is, how to generate the first parameter of the 'test( ????,'field error','field')'.
-->
    <div metal:define-macro="updateAddressInfo">
      <fieldset>
        <legend tal:content="python: aname + ' Address Information'"
                i18n:translate="legend_update_address_information">
        </legend>
        <table border=0>

          <tr><td>
   
<!--        Payee Address Line 1
 -->  

            <div class="field"
                 tal:define="error errors/${aname}_address1|nothing';"
                 tal:attributes="class python: test(error,
                                               'field error',
                                               'field')">
              <label tal:attributes="i18n:translate string:label_${aname}_address1'"
                     title="First line of address.">Address Line #1</label>

              <span class="fieldRequired" title="Required">(Required)</span>

              <input type="text"
                     tal:attributes="tabindex tabindex/next;
                     name string:${aname}_address1;
                     value request/python: aname+'_address1'|address1;"/>
            </div>

          </td></tr>
          <tr><td>