Avoid this problem by setting a content expiration header
on the Web server for each of the .htc files that are requested. For example,
one workaround would be to set the expiration on the .htc content to 1 day. By
default, the expiration is 1 day in Microsoft Internet Information
Services.
Client-side fix for Microsoft Internet Explorer 6
For more information about a client-side hotfix for Internet Explorer 6, click the following article number to view the article in the Microsoft Knowledge Base:
840312
Cached HTC files generate additional GET requests in Internet Explorer 6