Wallpaper for highlighted user does not appear in Ubuntu 14.04 login screen

[returningshadow]

The default wallpaper is shown, instead of the user-selected one.

ProblemType: Bug
DistroRelease: Ubuntu 14.04
Package: unity 7.1.2+14.04.20131106.1-0ubuntu2
ProcVersionSignature: Ubuntu 3.13.0-7.26-generic 3.13.1
Uname: Linux 3.13.0-7-generic x86_64
.tmp.unity.support.test.0:

ApportVersion: 2.13.2-0ubuntu2
Architecture: amd64
CompizPlugins: No value set for `/apps/compiz-1/general/screen0/options/active_plugins'
CompositorRunning: compiz
CompositorUnredirectDriverBlacklist: '(nouveau|Intel).*Mesa 8.0'
CompositorUnredirectFSW: true
CurrentDesktop: Unity
Date: Sat Feb 8 19:43:53 2014
DistUpgraded: Fresh install
DistroCodename: trusty
DistroVariant: ubuntu
DkmsStatus:
 bbswitch, 0.7, 3.13.0-7-generic, x86_64: installed
 nvidia-331, 331.38, 3.13.0-7-generic, x86_64: installed
 virtualbox, 4.3.2, 3.13.0-7-generic, x86_64: installed
 virtualbox-guest, 4.3.2, 3.13.0-7-generic, x86_64: installed
GraphicsCard:
 Intel Corporation 3rd Gen Core processor Graphics Controller [8086:0166] (rev 09) (prog-if 00 [VGA controller])
   Subsystem: Lenovo Device [17aa:21f5]
 NVIDIA Corporation GF108M [NVS 5400M] [10de:0def] (rev ff) (prog-if ff)
InstallationDate: Installed on 2014-02-08 (0 days ago)
InstallationMedia: Ubuntu 14.04 LTS "Trusty Tahr" - Alpha amd64 (20140207)
MachineType: LENOVO 2359CTO
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.13.0-7-generic.efi.signed root=UUID=6a931c37-eb20-4b8e-909c-eedce31f29a2 ro quiet splash vt.handoff=7
SourcePackage: unity
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 11/26/2013
dmi.bios.vendor: LENOVO
dmi.bios.version: G4ET98WW (2.58 )
dmi.board.asset.tag: Not Available
dmi.board.name: 2359CTO
dmi.board.vendor: LENOVO
dmi.board.version: Win8 STD DPK TPG
dmi.chassis.asset.tag: No Asset Information
dmi.chassis.type: 10
dmi.chassis.vendor: LENOVO
dmi.chassis.version: Not Available
dmi.modalias: dmi:bvnLENOVO:bvrG4ET98WW(2.58):bd11/26/2013:svnLENOVO:pn2359CTO:pvrThinkPadT530:rvnLENOVO:rn2359CTO:rvrWin8STDDPKTPG:cvnLENOVO:ct10:cvrNotAvailable:
dmi.product.name: 2359CTO
dmi.product.version: ThinkPad T530
dmi.sys.vendor: LENOVO
version.compiz: compiz 1:0.9.10+13.10.20131011-0ubuntu4
version.ia32-libs: ia32-libs N/A
version.libdrm2: libdrm2 2.4.52-1
version.libgl1-mesa-dri: libgl1-mesa-dri 10.0.1-1ubuntu2
version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental N/A
version.libgl1-mesa-glx: libgl1-mesa-glx 10.0.1-1ubuntu2
version.xserver-xorg-core: xserver-xorg-core 2:1.15.0-1ubuntu3
version.xserver-xorg-input-evdev: xserver-xorg-input-evdev 1:2.8.2-1ubuntu2
version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:7.3.0-1ubuntu2
version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.99.909-0ubuntu2
version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:1.0.10-1ubuntu2
xserver.bootTime: Sat Feb 8 19:41:11 2014
xserver.configfile: default
xserver.errors:

xserver.logfile: /var/log/Xorg.0.log
xserver.outputs:
 product id 4589
 vendor AUO
xserver.version: 2:1.15.0-1ubuntu3

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.

[Anirban Ghosh (anirban-ninja)]

Same problem I have in Ubuntu 13.10.

[[e-mail] (gklein-atc)]

I installed Ubuntu 14.04 LTS
I noticed the custom wallpapar does appear properly if the file is located in ther's home directory.
But it does not appear if the file is located in a sub-directory like the documents or pictures folders