Yeah, that's happens on some hardware during the shutdown when you do your reboot at the end of the install. In my case, I hit ENTER, it drops to a prompt, I type "reboot", it instantly reboots and boots up with the new settings you've entered in during the install for eth0 in conjunction with hotplug, etc. That netmount error happens if you haven't done the stuff below properly. Can't remember if it's when you don't add hotplug or if it's when you don't add modules into the kernel module autoloading file, but something is missing.
Ok everything network wise was working during the whole install. System was going into reboot but locked up on "bringing eth0 down". When I restarted there was a message saying "ERROR: Problem starting needed services. "netmount" was not started." So I did some searching on the net, and read some about the rc-update command. I deleted netmount, then readded it as default. Same result. I then deleted netmount again and added it as boot.