Themed checkboxes are showing highlight color in IE 11

3) When filling in check box's, everything gets highlighted

If your highlighting is turned on, it will be shown on all fields, but since the checkboxes are custom styled in our Form Designer, that is why it is not showing - when these custom codes / styles are used - which is happening on all browsers besides IE due to IE.

You can see more about this on this thread: Highlight Effect: Turning off highlight effect colors