Unity shows "Guest" as user name when autologged in as root

[Lisio]

I've added password for root account and make ubuntu to autologin as root via proper changes in lightdm.conf and users.conf files in /etc/lightdm folder.

And now I see "Guest" on panel at the top-right corner of the screen near gear icon. However, I can act as a root, everything fine here.

ProblemType: Bug
DistroRelease: Ubuntu 12.04
Package: unity 5.10.0-0ubuntu6
ProcVersionSignature: Ubuntu 3.2.0-24.37-generic 3.2.14
Uname: Linux 3.2.0-24-generic x86_64
NonfreeKernelModules: nvidia
ApportVersion: 2.0.1-0ubuntu7
Architecture: amd64
CompizPlugins: [core,composite,opengl,compiztoolbox,decor,vpswitch,snap,mousepoll,resize,place,move,wall,grid,regex,imgpng,session,gnomecompat,animation,fade,unitymtgrabhandles,workarounds,scale,expo,ezoom,unityshell]
Date: Sun May 6 07:27:37 2012
InstallationMedia: Ubuntu 12.04 LTS "Precise Pangolin" - Release amd64 (20120425)
ProcEnviron:
 TERM=xterm
 PATH=(custom, no user)
 LANG=en_US.UTF-8
 SHELL=/bin/bash
SourcePackage: unity
UpgradeStatus: No upgrade log present (probably fresh install)

[Biochemistry (biochemistrygmcs)]

same problem, after login to root, it shows guest

[Adolfo Jayme Barrientos (fitojb)]

The account name is now hidden by default, so this problem is (almost) invisible now.