update-manager says problem resolver generated errors

[Ricardo J. Moreira Teixeira]

When trying to upgrade the update-manager gives me this error:

An unresolvable problem occurred while calculating the upgrade.

Please report this bug against the 'update-manager' package and include the following error message:
E:Erro, pkgProblemResolver::Resolve gerou falhas, isto pode ser causado por pacotes mantidos (hold).

The part in portuguese roughly translatates to: E:Error, (d?)pkgProblemResolver::Resolve generated flaws, this may be caused by packages kept on hold.

ProblemType: Bug
DistroRelease: Ubuntu 12.10
Package: update-manager 1:0.169
ProcVersionSignature: Ubuntu 3.5.0-11.11-generic 3.5.2
Uname: Linux 3.5.0-11-generic i686
ApportVersion: 2.5.1-0ubuntu1
Architecture: i386
Date: Fri Aug 24 17:59:42 2012
ExecutablePath: /usr/bin/update-manager
GsettingsChanges: b'com.ubuntu.update-manager' b'launch-time' b'1345703461'
InstallationMedia: Ubuntu 12.10 "Quantal Quetzal" - Alpha i386 (20120730.1)
InterpreterPath: /usr/bin/python3.2mu
PackageArchitecture: all
SourcePackage: update-manager
UpgradeStatus: No upgrade log present (probably fresh install)