I am afraid you do...
I'll take this page as an example.
If I had the form on this page, I would like a phpscript to read the URL and delete the "?t=52583" part from it so that the form tag would something like
so when viewing the source code in IE, you would see it like
<form action="<?php echo $UrlFromAbove ?>" method="get">
This is because the form is not on the page itself, but in a footer, that I include in every page.
<form action="http://www.dynamicdrive.com/forums/showthread.php" method="get">