HOTFIX: A Web site takes a long time to load, and some elements are not displayed correctly when you use IE6 to visit the Web site through an HTTPS connection
If you capture network traffic when these symptoms occur, you notice that lots of CONNECT request connections are established. However, these connections are dropped without being used. This problem occurs because of an error in the Wininet.dll file.
http://support.microsoft.com/default.aspx/kb/941846