In Fedora 19 and Gnome 3 there is a rather annoying bug when using OpenVPN, the 'Use this connection only for resources on its network' tick box does not remained ticked, and causes the default route to be updated to point through the OpenVPN tunnel.
In some situations (mine) I do not want the default route to go down the OpenVPN tunnel, and so this was a problem.
Luckily there is a simple workaround until it gets fixed, open the relevant file for your VPN connection, for example /etc/NetworkManager/system-connections/Work.
Then find the section:
And add the line:
Hey presto, the tick box is now ticked!