unity gmail webapp doesn't work

[Beowulf]

I cannot find the app in Dash lens, and cannot see the icon in the launcher panel on the left. However, all other Unity web apps work including facebook, twitter and launchpad.

Firefox 16.0.2

ProblemType: Bug
DistroRelease: Ubuntu 12.10
Package: unity-webapps-gmail 2.4.7
ProcVersionSignature: Ubuntu 3.5.0-17.28-generic 3.5.5
Uname: Linux 3.5.0-17-generic x86_64
NonfreeKernelModules: fglrx wl
ApportVersion: 2.6.1-0ubuntu6
Architecture: amd64
Date: Fri Nov 2 01:29:39 2012
EcryptfsInUse: Yes
InstallationDate: Installed on 2012-05-11 (174 days ago)
InstallationMedia: Ubuntu 12.04 LTS "Precise Pangolin" - Release amd64 (20120425)
MarkForUpload: True
PackageArchitecture: all
SourcePackage: unity-webapps-gmail
UpgradeStatus: Upgraded to quantal on 2012-10-26 (6 days ago)