When connected to a wireless network, clicking on the network system indicator shows two buttons (with the wireless button displaying as enabled) at the top of the context menu. I can click on the wireless network to disable it. The wireless button displays as disabled and the list of access points disappears as expected.
However, if I now try to enable wireless by clicking on the button again, I can't. It has no effect. It seems the button, as well as the service, is disabled. To re-enable wireless I have to go into the System Settings. Is this normal? (a bug?) or is there a problem with my installation which needs to be corrected?