[Edubuntu] Theme is not selected

Hello!

I have tested Edubuntu amd64 (29384bfb45141e1d94d7502779e100f0 *raring-dvd-amd64.iso 20130206), on live usb persistent.

On System Settings > Appearance > Look , the theme is not selected (view screenshot attached).

ProblemType: Bug
DistroRelease: Ubuntu 13.04
Package: gnome-control-center 1:3.6.3-0ubuntu12
ProcVersionSignature: Ubuntu 3.8.0-4.8-generic 3.8.0-rc6
Uname: Linux 3.8.0-4-generic x86_64
ApportVersion: 2.8-0ubuntu4
Architecture: amd64
CasperVersion: 1.330
Date: Wed Feb 6 07:58:40 2013
ExecutablePath: /usr/bin/gnome-control-center
LiveMediaBuild: Edubuntu 13.04 "Raring Ringtail" - Alpha amd64 (20130206)
MarkForUpload: True
ProcEnviron:
 SHELL=/bin/bash
 XDG_RUNTIME_DIR=<set>
 PATH=(custom, no user)
 LANG=en_US.UTF-8
SourcePackage: gnome-control-center
UpgradeStatus: No upgrade log present (probably fresh install)
XsessionErrors:
 (gnome-control-center:6168): gnome-control-center-unity-WARNING **: Could not load /usr/share/themes/Adwaita/index.theme: No such file or directory
 (process:6183): GLib-CRITICAL **: g_slice_set_config: assertion `sys_page_size == 0' failed
usr_lib_gnome-control-center:
 activity-log-manager-control-center 0.9.4-0ubuntu6.1
 deja-dup 25.5-0ubuntu1
 gnome-control-center-signon 0.1.2bzr12.12.05-0ubuntu1
 gnome-control-center-unity 1.2-0ubuntu1
 indicator-datetime 12.10.3daily13.02.01-0ubuntu1