anchor.diff:          var changeBackground = function() {
               if (elements.background) {
                   $('body').css('background-color','transparent');
  -                elements.coreElement.css({'background-image': 'url('+elements.background+')', 'background-size': '100%', 'background-attachment': 'fixed'});
  +                elements.coreElement.css({'background-image': 'url(' + elements.background + ')'});
               } else {
  -                elements.coreElement.css({'background-image': 'none', 'background-size': 'auto', 'background-attachment': 'scroll'});
  +                elements.coreElement.css({'background-image': 'none'});
               }
           };
   
           var setBackground = function(el) {
               elements.background = $(el).find('img').attr('src') || '';
  -            elements.background = elements.background.replace("/thumbnails","");
  +            elements.background = elements.background.replace('/thumbnails', '');
               elements.form.find('.background-value').val(elements.background);
   
               changeBackground();
  
positive.code:         vertical-align: middle;
          cursor: pointer;
          color: rgb(51, 51, 51);
          text-shadow: 0px 1px 1px rgba(255, 255, 255, 0.75);
          background-color: #DEDEDE;
          background: rgb(245, 245, 245) linear-gradient(to bottom, rgb(255, 255, 255), rgb(230, 230, 230)) repeat-x;
          border: 1px solid rgb(204, 204, 204);
          border-bottom-color: rgb(179, 179, 179);
          border-image: none;
          border-radius: 4px 4px 4px 4px;
          box-shadow: 0px 1px 0px rgba(255, 255, 255, 0.2) inset, 0 1px 2px rgba(0, 0, 0, 0.05);
      }
      #${n}background-edit-control .background-edit-button .edit-button-image {
          background: url("/ResourceServingWebapp/rs/famfamfam/silk/1.3/image_edit.png") no-repeat;
          height: 16px;
  
negative.code:     <portlet:param name="action" value="savePreferences"/>
  </portlet:actionURL>
  
  <style id="#${n}background-preference-stylesheet">
  
      /* Styles to set the background to the previously-selected image */
      <c:if test="${backgroundImage ne null}">
      ${backgroundContainerSelector}::before,
      html.um-dashboard {
          background-image: url("${backgroundImage}");
      }
      </c:if>
  
      html.um-dashboard,
      html.um-dashboard body {
          background-color: transparent;
      }
  
      /* Syles for the background selector widget itself  */
      #${n}background-edit-control {
          min-width: 150px;
          float: right;
          margin-right: 12px;
      }
  
  