should be either NULL or a valid callback
<p>Just moved to a new server and am now getting this message on a form submit that has a multiple checkbox options. Is this php.ini related? I think the old box was on php4 and we are now on 5.</p>

<blockquote>
  <p>Warning: array_map() [function.array-map]: The first argument, 'stripslashes_deep_ds', should be either NULL or a valid callback in...</p>
</blockquote>
