anchor.diff:  
               // Generate and append result content
               // DEV: We use a document fragment to avoid `n` DOM edits -- instead it's 1
  -            var resultGroupEl = D.DIV([
  -              D.TR([
  -                // TODO: Add collapse support like in `gemini-gui`
  -                D.TD({colspan: 3}, D.B(imageSetInfo.humanName))
  +            var resultGroupEl = D.FRAGMENT([
  +              D.THEAD([
  +                D.TR([
  +                  // TODO: Add collapse support like in `gemini-gui`
  +                  D.TD({colspan: 3}, D.B(imageSetInfo.humanName))
  +                ]),
  +                D.TR([
  +                  // TODO: Move style out of inline and to classes for more performance
  +                  // DEV: `min-width` is to give us spacing for "Save update text"
  +                  D.TH({style: 'padding-right: 10px; min-width: 120px;'}, 'Save update:'),
  +                  D.TH('Original ref:'),
  +                  D.TH('Updated ref:')
  +                ]),
                 ]),
  -              D.TR([
  -                // TODO: Move style out of inline and to classes for more performance
  -                // DEV: `min-width` is to give us spacing for "Save update text"
  -                D.TD({style: 'padding-right: 10px; min-width: 100px;'}, 'Save update:'),
  -                D.TD('Original ref:'),
  -                D.TD('Updated ref:')
  -              ]),
  -              D.TR([
  -                D.TD({
  -                  style: 'vertical-align: top;'
  -                }, [
  -                  D.INPUT({type: 'checkbox', checked: true})
  -                ]),
  -                D.TD({style: 'vertical-align: top;'}, [refImgClone]),
  -                D.TD({style: 'vertical-align: top;'}, [canvasEl])
  +              D.TBODY([
  +                D.TR([
  +                  D.TD({
  +                    style: 'vertical-align: top;'
  +                  }, [
  +                    D.INPUT({type: 'checkbox', checked: true})
  +                  ]),
  +                  D.TD({style: 'vertical-align: top;'}, [refImgClone]),
  +                  D.TD({style: 'vertical-align: top;'}, [canvasEl])
  +                ])
                 ])
               ]);
  -            resultsDocFrag.appendChild(resultGroupEl);
  +            resultsTableEl.appendChild(resultGroupEl);
   
               // TODO: When bulk update is accepted, send overwrite requests to server with new image as "Ref"
               //   and use `?1` trick to refresh images
  
positive.code:           });
  
            // Append aggregate content to DOM
            resultsEl.appendChild(resultsDocFrag);
  
            // End our performance check
            console.timeEnd('bulkUpdateSelection');
  
negative.code:           console.time('bulkUpdateSelection');
  
            // Find our output targets
            var resultsTableEl = D.TABLE({class: 'table'});
  
            // Generate and updated ref image for each of our comparisons
            imageSetInfos.forEach(function generateUpdatedRef (imageSetInfo) {
  