Urgent: Problem with KB961260 on vista 64 (network stops working)

After KB961260 installs on my Vista 64 Home Premium system my connection to
the LAN & Internet stop functioning properly.

I only have one network connection on my machine to my LAN. Before the
install this shows up properly. After the install of KB961260 windows shows
my machine as having two connections - one to my local network "Private
network", and one to an Unidentified network "Public network".

There is only one LAN interface on my machine, and it's only connected to
one network. Checking the properties of the networks after installing the
update show that both have the same IP address, however they conflict with
each other, and windows tells me to unplug one of them. Since there's only
one network connection that's impossible, and I have to back out the patch to
get the connection working again.