Cannot disable wireless in network manager

[rundgren]

I'm connected to a wired network, but Network Manager still insists on trying to connect to a wireless network in range and periodically pops up the password dialog for this network - very interruptive.
Weirdly, wireless cannot be disabled in NM (check cannot be removed from "Enable Wireless"-option.)
Additionally, the wireless switch on my laptop seems to have no effect at all (I'd expect the "Enable Wireless"-option to be grayed out when the switch is in the off position.)
"Edit Connections" in NM does nothing as well...
I've tried restarting the network-manager service (sudo service network-manager restart), but nothing changes.

I'm wondering if this is somehow related to suspend and/or docking. Ubuntu usually gets in this state after I've gone from wireless (at home) and brought the laptop to work still powered on, docking it and connecting to the wired network .

ProblemType: Bug
DistroRelease: Ubuntu 12.10
Package: network-manager 0.9.6.0-0ubuntu7
ProcVersionSignature: Ubuntu 3.5.0-26.42-generic 3.5.7.6
Uname: Linux 3.5.0-26-generic i686
NonfreeKernelModules: nvidia
ApportVersion: 2.6.1-0ubuntu10
Architecture: i386
Date: Mon Apr 8 11:16:44 2013
EcryptfsInUse: Yes
IfupdownConfig:
 # interfaces(5) file used by ifup(8) and ifdown(8)
 auto lo
 iface lo inet loopback
InstallationDate: Installed on 2013-02-11 (56 days ago)
InstallationMedia: Ubuntu 12.10 "Quantal Quetzal" - Release i386 (20121017.2)
IpRoute:
 default via 195.225.18.1 dev eth0 proto static
 169.254.0.0/16 dev eth0 scope link metric 1000
 195.225.18.0/23 dev eth0 proto kernel scope link src 195.225.18.16 metric 1
MarkForUpload: True
NetworkManager.state:
 [main]
 NetworkingEnabled=true
 WirelessEnabled=true
 WWANEnabled=true
 WimaxEnabled=true
ProcEnviron:
 TERM=xterm
 PATH=(custom, no user)
 XDG_RUNTIME_DIR=<set>
 LANG=en_US.UTF-8
 SHELL=/bin/bash
SourcePackage: network-manager
UpgradeStatus: No upgrade log present (probably fresh install)
mtime.conffile..etc.NetworkManager.NetworkManager.conf: 2013-03-05T10:54:00.048002
nmcli-dev:
 DEVICE TYPE STATE DBUS-PATH
 wlan0 802-11-wireless disconnected /org/freedesktop/NetworkManager/Devices/1
 eth0 802-3-ethernet connected /org/freedesktop/NetworkManager/Devices/0
nmcli-nm:
 RUNNING VERSION STATE NET-ENABLED WIFI-HARDWARE WIFI WWAN-HARDWARE WWAN
 running 0.9.6.0 connected enabled enabled enabled enabled disabled

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.

[B Bobo (yout-bobo123)]

Also in Ubuntu 12.04 precise and 13.04 raring