Clicking "All Software" makes back button active

[Michael Terry]

Steps to reproduce:

1) Open Software Center, landing on the "welcome" page
2) Click "All Software" at the top

What happens:
The back button becomes active. Clicking it just takes you "back" to the same page. And you can go forward again to the same page.

What I expected:
The back button to remain inactive, as the welcome page and the All Software page are the same.

ProblemType: Bug
DistroRelease: Ubuntu 12.04
Package: software-center 5.2
ProcVersionSignature: Ubuntu 3.2.0-23.36-generic-pae 3.2.14
Uname: Linux 3.2.0-23-generic-pae i686
ApportVersion: 2.0.1-0ubuntu4
Architecture: i386
CheckboxSubmission: 9a284f3f6b4f7829abbe27ad9573a709
CheckboxSystem: 3935143777c965daaa64b51f0134f712
Date: Mon Apr 16 15:59:14 2012
EcryptfsInUse: Yes
InstallationMedia: Ubuntu 11.04 "Natty Narwhal" - Release i386 (20110422)
PackageArchitecture: all
SourcePackage: software-center
UpgradeStatus: Upgraded to precise on 2011-11-05 (162 days ago)