jdMorgan - 3:23 pm on Dec 29, 2007 (gmt 0) Marcia: Jim
It will only remove %nn tails on the URL-path-part. A query string is not part of a URL, but rather, data attached to a URL to be passed to the resource at that URL.
The original query-string attached to the URL (if any) is retained.
You can use a different code snippet to remove spurious query strings - It's been posted elsewhere on WebmasterWorld several times. But, as highlighted by Frank's question above, you do need to be sure that it won't break your site. :)