Says there are updates available when there are none

[Lal Samuel Varghese]

The indicator on the top panel says there are 4 updates available. When I click on Show updates a window pops up which says The software on this computer is up to date.

ProblemType: Bug
DistroRelease: Ubuntu 13.04
Package: update-manager 1:0.186.2
ProcVersionSignature: Ubuntu 3.8.0-30.44-generic 3.8.13.6
Uname: Linux 3.8.0-30-generic i686
ApportVersion: 2.9.2-0ubuntu8.3
Architecture: i386
Date: Fri Sep 13 10:02:46 2013
ExecutablePath: /usr/bin/update-manager
GsettingsChanges:
 b'com.ubuntu.update-manager' b'first-run' b'false'
 b'com.ubuntu.update-manager' b'launch-time' b'1379046733'
 b'com.ubuntu.update-manager' b'show-details' b'true'
 b'com.ubuntu.update-manager' b'window-height' b'440'
 b'com.ubuntu.update-manager' b'window-width' b'484'
InstallationDate: Installed on 2012-08-16 (392 days ago)
InstallationMedia: Ubuntu 12.04 LTS "Precise Pangolin" - Release i386 (20120423)
InterpreterPath: /usr/bin/python3.3
MarkForUpload: True
PackageArchitecture: all
ProcEnviron:
 LANGUAGE=en_IN:en
 PATH=(custom, user)
 XDG_RUNTIME_DIR=<set>
 LANG=en_IN
 SHELL=/bin/bash
SourcePackage: update-manager
UpgradeStatus: Upgraded to raring on 2013-05-30 (105 days ago)