Unity-2d launcher doesn't use default auto-hide behaviour

[Ingo86]

Default behaviour of unity-2d launcher consists of disabled auto-hiding ability. When I install ubuntu this behaviour is not respected and the launcher is not always visible.
After seeing that, if I go to the appearance panel into the gnome system settings I see that the behaviour is reported correctly (the option is set correctly). At that time it stops auto-hiding and stays always on top, without changing any configuration.

ProblemType: Bug
DistroRelease: Ubuntu 12.04
Package: unity-2d 5.4.0-0ubuntu1
ProcVersionSignature: Ubuntu 3.2.0-17.27-generic-pae 3.2.6
Uname: Linux 3.2.0-17-generic-pae i686
ApportVersion: 1.94-0ubuntu1
Architecture: i386
Date: Sat Mar 3 12:57:40 2012
InstallationMedia: Ubuntu 12.04 LTS "Precise Pangolin" - Beta i386 (20120301)
PackageArchitecture: all
ProcEnviron:
 TERM=xterm
 PATH=(custom, no user)
 LANG=it_IT.UTF-8
 SHELL=/bin/bash
SourcePackage: unity-2d
UpgradeStatus: No upgrade log present (probably fresh install)

[Launchpad Janitor (janitor)]

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