I'm testing Vista RC2 on our LAN and it's doing something really strange. It's attempting to tell our DHCP server that there is a conflict on every single address in it's scope. I can hit refresh on the Microsoft DHCP server and just watch the red X's count up the scope until I power off the Vista box or set it to a static IP address. On the Vista desktop, it's telling me that there is an IP address conflict and that the adapter will be disabled. Meanwhile, our DHCP server no longer has any addresses in it's scope to hand out to new clients. Needless to say, this is not good. I have to go into the DHCP server administrator and hand delete all of the conflicting IP address entries. Has anyone else ran into this and is there something that I can change to keep this from happening?