Corruption in login window following reboot

Xubuntu - updated and upgraded.

Steps to reproduce -

Reboot.

Restart into other install.

Restart into mir install.

Read what was on the screens in previous boot prior to a restart from the mir login window

Screenshot included

ProblemType: Bug
DistroRelease: Ubuntu 13.10
Package: unity-system-compositor 0.0.1+13.10.20130821-0ubuntu1
ProcVersionSignature: Ubuntu 3.11.0-2.5-generic 3.11.0-rc5
Uname: Linux 3.11.0-2-generic x86_64
ApportVersion: 2.12.1-0ubuntu2
Architecture: amd64
Date: Wed Aug 21 19:06:27 2013
GraphicsCard:
 NVIDIA Corporation GT218 [GeForce 210] [10de:0a65] (rev a2) (prog-if 00 [VGA controller])
   Subsystem: ZOTAC International (MCO) Ltd. Device [19da:1160]
InstallationDate: Installed on 2013-08-09 (12 days ago)
InstallationMedia: Xubuntu 13.10 "Saucy Salamander" - Alpha amd64 (20130808)
LightDMLog: Error: [Errno 13] Permission denied: '/var/log/lightdm/lightdm.log'
MarkForUpload: True
SourcePackage: unity-system-compositor
UnitySystemCompositorLog: Error: [Errno 13] Permission denied: '/var/log/lightdm/unity-system-compositor.log'
UpgradeStatus: No upgrade log present (probably fresh install)
version.libdrm: libdrm2 2.4.46-1
version.lightdm: lightdm 1.7.9-0ubuntu1
version.mesa: libegl1-mesa-dev N/A