[squid-users] IE6 and Squid Problem

I'm encountering a strange problem with IE6 SP1 (Version 6.0.2800.1106)
and Squid 2.5STABLE3. Squid is running on Linux kernel 2.4.18 and is
using basic authentication with LDAP. IE is set to forward SSL requests
through Squid. When making a request to an SSL server such as
https://www.visa.com I get the authentication window. After successfully
authenticating I get the error listed below. After clicking refresh the
problem does not occur. This problem does not occur when using Mozilla
1.4. It also does not occur when using IE with Squid 2.4STABLE7.

ERROR
The requested URL could not be retrieved

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While trying to retrieve the URL: /

The following error was encountered:

Invalid URL
Some aspect of the requested URL is incorrect. Possible problems:

Missing or incorrect access protocol (should be `http://'' or similar)
Missing hostname
Illegal double-escape in the URL-Path
Illegal character in hostname; underscores are not allowed
Your cache administrator is webmaster.

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Generated Thu, 24 Jul 2003 17:28:11 GMT by proxytest.highmark.com
(squid/2.5.STABLE3)

Nothing appears in the cache.log. The access.log has the following:

1059069117.037 1 157.154.194.16 TCP_DENIED/407 1190 CONNECT
www.visa.com:443 - NONE/- text/html
1059069131.463 232 157.154.194.16 NONE/400 1502 GET / - NONE/-
text/html
Received on Thu Jul 24 2003 - 11:59:49 MDT