New KB article - IE6 and Content Advisor
When Content Advisor is enabled, Internet Explorer 6 may repeatedly send GET requests to the root of a Web site
This issue occurs if Internet Explorer does not associate the scripts on a particular Web site with any existing Content Advisor rules. In this situation, Internet Explorer sends a GET request to the root of the Web site to locate the configuration file for the rule.
http://support.microsoft.com/default.aspx?scid=kb;en-us;924456