New KB article: unable to connect to certain Web pages or fully load pages after upgrading to ISA2004
You may experience connectivity issues on client computers after you upgrade ISA Server 2000 to ISA Server 2004
http://support.microsoft.com/default.aspx?scid=kb;en-us;927099
• The client computer cannot correctly connect to certain Web sites, and the page is incomplete.
• An application cannot correctly connect to the Windows SBS server to obtain its resources.
• The following event may be logged in the Application log in Event Viewer on the ISA Server computer:
Event Source: Microsoft Firewall
Event Category: Packet filter
Event ID: 15113
Type: Warning
Description: ISA Server disconnected the following client: IP address because its connection limit was exceeded.