WiFi won't work after returning from hibernation

Sometimes, when I return from hibernation NetworkManager won’t reconnect with my WiFi network. It just sits there saying “Not connected”. I’ve tried restarting NetworkManager to no avail. Only a full reboot fixes this annoying behavior.

http://i.imgur.com/XVfPm.png

Is this a known bug or just a little glitch I can fix? This is very annoying.

Just a hunch, does this command help: su -c “rcnetwork restart”