If you are using Vista and ISA, you will be used to getting a compatibility warning when the client loads.  Well, this KB and download gives you a time when that is no longer the truth :-)

From the joys of Susan B's blog  View article.....

How to obtain the version of Firewall Client for ISA Server (December
2006) that includes Windows Vista support:
http://support.microsoft.com/kb/929556

Finally the ISA firewall client that will support Vista is out today and there's a new WSUS category to boot!

As always, be careful when playing with your systems

ttfn

David