After upgrade to raring, motd says New release '13.04' available even after reboot

[Sylwester]

I did graphical upgrade from the desktop and replaced all config that were prompted. I did clean up after as suggested and rebooted. Now, one day after, I see that the message about new release is still there. motd is generated so removing it will only remove it for a little while.

Workarounds:
According to http://askubuntu.com/questions/287939/update-available-message-after-installing-update
you can remove the file /var/lib/ubuntu-release-upgrader/release-upgrade-available
I guess that the updater needs to remove this cache as a fix.

ProblemType: Bug
DistroRelease: Ubuntu 13.04
Package: ubuntu-release-upgrader-core 1:0.192.10
ProcVersionSignature: Ubuntu 3.8.0-19.29-generic 3.8.8
Uname: Linux 3.8.0-19-generic x86_64
NonfreeKernelModules: nvidia
ApportVersion: 2.9.2-0ubuntu8
Architecture: amd64
CrashDB: ubuntu
Date: Tue Apr 30 12:42:11 2013
InstallationDate: Installed on 2012-09-01 (241 days ago)
InstallationMedia: Ubuntu 12.04.1 LTS "Precise Pangolin" - Release amd64 (20120823.1)
MarkForUpload: True
PackageArchitecture: all
SourcePackage: ubuntu-release-upgrader
UpgradeStatus: Upgraded to raring on 2013-04-29 (1 days ago)
VarLogDistupgradeTermlog: