Comment 40 for bug 417664

Network Manager sucks in so many ways. VPN with pptp doesn't work right under it and if you just set it up VPN command-line because NM will fight it, periodically resetting your resolv.conf and playing with your routes. Also, if you want your computer on the network when someone isn't logged in (so that you can ssh in or run a media server or something) NM will not help you. And then there's the thing with the static IPs. It sucks and it's sucked for a long time and the problems don't get fixed and lots of people don't use it because of the sucking problem.

So, U1 can't depend on NM. That's clearly the real bug that needs fixing.