Unity desktop appearance settings overlook icon customization

[Wolter HV]

An icon set cannot be selected from within the Unity Appearance settings (accessed through System Settings > Appearance). This should be possible; it previously was.

ProblemType: Bug
DistroRelease: Ubuntu 13.04
Package: gnome-control-center 1:3.6.3-0ubuntu24.1
ProcVersionSignature: Ubuntu 3.8.0-25.37-generic 3.8.13
Uname: Linux 3.8.0-25-generic x86_64
NonfreeKernelModules: nvidia
ApportVersion: 2.9.2-0ubuntu8.1
Architecture: amd64
Date: Sun Jun 23 18:17:06 2013
InstallationDate: Installed on 2011-10-16 (616 days ago)
InstallationMedia: Ubuntu 11.10 "Oneiric Ocelot" - Release amd64 (20111012)
MarkForUpload: True
SourcePackage: gnome-control-center
UpgradeStatus: Upgraded to raring on 2013-04-28 (56 days ago)
usr_lib_gnome-control-center:
 activity-log-manager-control-center 0.9.4-0ubuntu6.1
 deja-dup 26.0-0ubuntu1
 gnome-control-center-signon 0.1.6bzr13.04.05-0ubuntu1.1
 gnome-control-center-unity 1.2daily13.04.09-0ubuntu1
 indicator-datetime 12.10.3daily13.03.26-0ubuntu1