Well, I think this is a bug of gnome-panel, because not just the network-manager applet disappears, but also other icons like Beagle of aMule.
-- Network Manager disappears when Gnome Panel crashes https://launchpad.net/bugs/73497 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
