Developer forum

This is a known issue (bug) with CKEditor (cf. http://dev.ckeditor.com/ticket/10021) and there is no easy fix.

The best we can come up with right now is adding this to your configuration file

CKEDITOR.on('dialogDefinition', function(ev) {
  var dialogName = ev.data.name;
  var dialogDefinition = ev.data.definition;

  if (dialogName === 'table') {
    var infoTab = dialogDefinition.getContents('info');
    infoTab.remove('txtCellSpace');
    infoTab.remove('txtCellPad');
    infoTab.remove('txtBorder');
    infoTab.remove('txtWidth');
    infoTab.remove('txtHeight');
  }
});

This removes the settings for "cellspacing", "cellpadding", "border", "width" and "height" from the table dialog (A huge thank you goes out to http://ckeditor.com/comment/54582#comment-54582).

When editing existing tables (having the unwanted attributes) the attributes should be removed and this can be done using something like

CKEDITOR.on('dialogDefinition', function(ev) {
  var dialogName = ev.data.name;
  var dialogDefinition = ev.data.definition;

  if (dialogName === 'table') {
    var infoTab = dialogDefinition.getContents('info');
    infoTab.get('txtCellPad').commit = function(data, table) { table.removeAttribute('cellPadding'); }
  }
});

It's not very beautiful solutions, but it's the best we can do right now without having to break open the CKEditor core and start hacking it.

Best regards,
Mikkel