If content of a page that contains rich:datatable is zoomed in/out (say using Ctrl key+Mouse wheel) the columns/rows borders appear and disappear.

The issue is present both on Firefox and IE 7, and a simple test can be done at:

http://livedemo.exadel.com/richfaces-demo/richfaces/dataTable.jsf?c=dataTable&tab=usage

Is there any workaround/fix for this?