greeter allows start of gnome-control-center via power-settings

[Sam_]

Due to testing of Bug #830175 and Bug #811853 the empty sliver beside date-time displays in drop-down menu 'Show time in menu bar' and 'Power settings'.
Click on power-settings opens the dialog where one can en-disable settings.
Click on settings (top left) opens g-c-c, e.g. click on audio opens audio-settings.
Switch to tty and grep process of g-c-c:
lightdm 7361 0.1 0.8 900884 31436 ? Sl 03:24 0:01 gnome-control-center power

While audio-settings are open one is able to login. After login it first disappears but is displayed after short time with window decorations.

Expected.
Don't allow access to g-c-c before login.

ProblemType: Bug
DistroRelease: Ubuntu 11.10
Package: unity-greeter 0.0.2-0ubuntu3
ProcVersionSignature: Ubuntu 3.0.0-8.11-generic 3.0.1
Uname: Linux 3.0.0-8-generic x86_64
NonfreeKernelModules: wl
Architecture: amd64
Date: Sun Aug 21 03:45:31 2011
InstallationMedia: Ubuntu 11.04 "Natty Narwhal" - Release amd64 (20110423)
ProcEnviron:
 PATH=(custom, no user)
 LANG=C
 SHELL=/bin/bash
SourcePackage: unity-greeter
UpgradeStatus: Upgraded to oneiric on 2011-08-01 (19 days ago)