Background of slider widget in sound menu is incorrect

[Nekhelesh Ramananthan]

I am running the daily build of Ubuntu 12.04. Previously I was affected by this bug https://bugs.launchpad.net/ubuntu/+source/light-themes/+bug/917830. However an update to the light-themes package solved the problem. However this fix has probably introduced another bug. The sound indicator displays a volume slider which does not match the theme. I have added a video screencast displaying the problem.

ProblemType: Bug
DistroRelease: Ubuntu 12.04
Package: light-themes 0.1.8.27.1
ProcVersionSignature: Ubuntu 3.2.0-12.21-generic-pae 3.2.2
Uname: Linux 3.2.0-12-generic-pae i686
ApportVersion: 1.91-0ubuntu1
Architecture: i386
Date: Sat Feb 4 11:54:55 2012
InstallationMedia: Ubuntu 12.04 LTS "Precise Pangolin" - Alpha i386 (20120116.2)
PackageArchitecture: all
ProcEnviron:
 PATH=(custom, no user)
 LANG=en_US.UTF-8
 SHELL=/bin/bash
SourcePackage: light-themes
UpgradeStatus: Upgraded to precise on 2012-02-03 (0 days ago)