software-center is not shown as an option when clicking on apt: link

[Vincent Gerris]

When I click on the link here:
https://help.ubuntu.com/community/RestrictedFormats/
for the restricted extra's there is no option shown to open it.
It should be showing software-center, like it did in previous versions.
The link being clicked is apt:ubuntu-restricted-extras?section=universe?section=multiverse
When I add it manually buy choosing /usr/bin/software-center , it works and shows the ubuntu-restricted-extras package.

Not sure if this is a software bug or some mime-type or apt thing, but I thought software-center would contain something that shows itself in the popup window.
Attached is a screenshot from the popup window after I manually added software-center.

ProblemType: Bug
DistroRelease: Ubuntu 14.04
Package: software-center 13.10-0ubuntu4.1
ProcVersionSignature: Ubuntu 3.13.0-24.46-generic 3.13.9
Uname: Linux 3.13.0-24-generic x86_64
NonfreeKernelModules: nvidia
ApportVersion: 2.14.1-0ubuntu3
Architecture: amd64
CurrentDesktop: Unity
Date: Thu Apr 24 21:23:25 2014
InstallationDate: Installed on 2014-04-06 (17 days ago)
InstallationMedia: Ubuntu 14.04 LTS "Trusty Tahr" - Alpha amd64 (20140303)
PackageArchitecture: all
SourcePackage: software-center
UpgradeStatus: No upgrade log present (probably fresh install)