login menu does not show previous session type 2D, 3D

[candtalan]

Ubuntu 12.04 beta1 updated:

login to Ubuntu (3D) session on a machine capable of 3D session
notice 3D Unity is running ok
log out from the 3D session

at login display, choose Ubuntu 2D session, and log in
notice that 2D session is running ok
log out from the 2D session

then
at the login display, use the session menu to examine the indicated session information.

What I expect to see is a check mark against the previous Ubuntu 2D session
but what I actually see is a default highlight on the Ubuntu 3D session, not a mark indicating previous session type.

ProblemType: Bug
DistroRelease: Ubuntu 12.04
Package: login 1:4.1.4.2+svn3283-3ubuntu4
ProcVersionSignature: Ubuntu 3.2.0-18.29-generic-pae 3.2.9
Uname: Linux 3.2.0-18-generic-pae i686
ApportVersion: 1.94.1-0ubuntu2
Architecture: i386
Date: Sat Mar 17 08:46:44 2012
InstallationMedia: Ubuntu 12.04 LTS "Precise Pangolin" - Beta i386 (20120301)
ProcEnviron:
 LANGUAGE=en_GB:en
 TERM=xterm
 LANG=en_GB.UTF-8
 SHELL=/bin/bash
SourcePackage: shadow
UpgradeStatus: Upgraded to precise on 2012-03-15 (1 days ago)