SharePoint 2007 Designer - this page contains markup that is not valid when attached to a master page

The problem arises when creating a custom form and attaching it to a master page.  The problem is SharePoint Designer inserts an empty script tag into custom forms.  Go to code view and search for <script /> and delete it. 

http://social.msdn.microsoft.com/Forums/en/sharepointcustomization/thread/184a40da-01f0-44a0-a90b-0e719132eae0