Valid links placed on desktop reported as broken after logon

[f(fanta)]

Steps to reproduce:
- place on the Desktop some symbolic links to directories that are somewhere below /media (e.g. with drag-and-drop from "Files")
- restart ubuntu and log on again
- the links now appear in the desktop as broken links (with a padlock in the icon, see attached screenshot)
- clicking on the link icon and try to open it, you get an error message, and the linked directory does not open; the directory is expected to open in "Files"

Workaround:
- navigate to the linked directory by mean of "Files" or with command "CD" in a shell
- click on the background of the desktop
- hit F5 on the keyboard
- now the links change icon, and by clicking on them they open as expected

The issue is systematic.

ProblemType: Bug
DistroRelease: Ubuntu 14.10
Package: unity 7.3.1+14.10.20141016-0ubuntu1
ProcVersionSignature: Ubuntu 3.16.0-24.32-generic 3.16.4
Uname: Linux 3.16.0-24-generic x86_64
NonfreeKernelModules: nvidia
ApportVersion: 2.14.7-0ubuntu8
Architecture: amd64
CompizPlugins: No value set for `/apps/compiz-1/general/screen0/options/active_plugins'
CurrentDesktop: Unity
Date: Sat Nov 15 01:20:02 2014
InstallationDate: Installed on 2014-11-12 (2 days ago)
InstallationMedia: Ubuntu 14.10 "Utopic Unicorn" - Release amd64 (20141022.1)
SourcePackage: unity
UpgradeStatus: No upgrade log present (probably fresh install)