Anybody else feeling this/have any idea how to fix it without reinstalling Snow Leopard? This seems very similar to problems PD used to have back in 2008 (forum link)
FWIW, my current network interfaces are:
$ ifconfig -l
lo0 gif0 stf0 en0 en1 fw0 vnic0 vnic1 vmnet1 vmnet8
(And yes, as you can see from the NICs, I also run VMWare Fusion 3.1.1, but the issue started upon upgrading to PD6)
$ ifconfig
lo0: flags=8049<UP,LOOPBACK,RUNNING,MULTICAST> mtu 16384
inet6 ::1 prefixlen 128
inet6 fe80::1%lo0 prefixlen 64 scopeid 0x1
inet 127.0.0.1 netmask 0xff000000
inet6 fd18:d7ce:18ee:1e60:223:32ff:fea0:fade prefixlen 128
gif0: flags=8010<POINTOPOINT,MULTICAST> mtu 1280
stf0: flags=0<> mtu 1280
en0: flags=8863<UP,BROADCAST,SMART,RUNNING,SIMPLEX,MULTICAST> mtu 1500
ether HH:II:DD:DD:EE:NN
media: autoselect
status: inactive
en1: flags=8863<UP,BROADCAST,SMART,RUNNING,SIMPLEX,MULTICAST> mtu 1500
ether HH:II:DD:DD:EE:NN
inet6 HH:II:DD:DD:EE:NN%en1 prefixlen 64 scopeid 0x5
inet 192.168.0.198 netmask 0xffffff00 broadcast 192.168.0.255
media: <unknown subtype>
status: active
fw0: flags=8863<UP,BROADCAST,SMART,RUNNING,SIMPLEX,MULTICAST> mtu 4078
lladdr 90:84:0d:ff:fe:ba:6d:2a
media: autoselect <full-duplex>
status: inactive
vnic0: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> mtu 1500
ether 00:1c:42:00:00:08
inet 10.211.55.2 netmask 0xffffff00 broadcast 10.211.55.255
inet6 fe80::21c:42ff:fe00:8%vnic0 prefixlen 64 scopeid 0x7
inet6 ::1 prefixlen 64
media: autoselect
status: active
vnic1: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> mtu 1500
ether 00:1c:42:00:00:09
inet 10.37.129.2 netmask 0xffffff00 broadcast 10.37.129.255
inet6 fe80::21c:42ff:fe00:9%vnic1 prefixlen 64 scopeid 0x8
inet6 ::1 prefixlen 64
media: autoselect
status: active
vmnet1: flags=8863<UP,BROADCAST,SMART,RUNNING,SIMPLEX,MULTICAST> mtu 1500
ether 00:50:56:c0:00:01
inet 172.16.155.1 netmask 0xffffff00 broadcast 172.16.155.255
vmnet8: flags=8863<UP,BROADCAST,SMART,RUNNING,SIMPLEX,MULTICAST> mtu 1500
ether 00:50:56:c0:00:08
inet 192.168.102.1 netmask 0xffffff00 broadcast 192.168.102.255
$ cat /etc/resolv.conf
nameserver 208.67.220.220
nameserver 208.67.222.222