We have a Windows 2003 network with 4 Macintosh clients who are running OS X 10.3. Up until recently our network/firewall was Windows 2000/ISA Server 2000. The Macintosh clients had no problems browsing at all. The 2000 server was replaced with a 2003 server running ISA Server 2004. The configuration was exported from ISA Server 2000 and imported into ISA Server 2004. Since then the Macintosh clients are having browser delays. Pages are always found it's just that sometimes pages are taking minutes to load. This problem occurs with both Safari and Internet Explorer. All PC clients are browsing fine.