E: Error, pkgProblemResolver::Resolve generated breaks, this may be caused by held packages.

[Sanjeev Gupta]

This is a quantal upgraded from precise, daily updates/upgrades.

apt-get update completes successfully. apt-get upgrade completes successfully.

apt-get dist-upgrade :

root@precise-X201:~# apt-get dist-upgrade
Reading package lists... Done
Building dependency tree
Reading state information... Done
Calculating upgrade... Failed
The following packages have unmet dependencies:
 gnome-control-center : Breaks: metacity (< 1:2.34.2) but 1:2.34.1-1ubuntu11 is to be installed
E: Error, pkgProblemResolver::Resolve generated breaks, this may be caused by held packages.

There are no held packages.

root@precise-X201:~# lsb_release -rd
Description: Ubuntu quantal (development branch)
Release: 12.10

root@precise-X201:~# apt-cache policy metacity
metacity:
  Installed: 1:2.34.1-1ubuntu11
  Candidate: 1:2.34.3-3ubuntu1
  Version table:
     1:2.34.3-3ubuntu1 0
        500 http://us.archive.ubuntu.com/ubuntu/ quantal-proposed/main amd64 Packages
        500 http://sg.archive.ubuntu.com/ubuntu/ quantal-proposed/main amd64 Packages
 *** 1:2.34.1-1ubuntu11 0
        500 http://uk.archive.ubuntu.com/ubuntu/ quantal/main amd64 Packages
        100 /var/lib/dpkg/status

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 x86_64
ApportVersion: 2.5.1-0ubuntu1
Aptdaemon:

Architecture: amd64
Date: Fri Aug 24 10:15:33 2012
GsettingsChanges:
 b'com.ubuntu.update-manager' b'first-run' b'false'
 b'com.ubuntu.update-manager' b'launch-time' b'1339681272'
 b'com.ubuntu.update-manager' b'show-details' b'true'
 b'com.ubuntu.update-manager' b'window-height' b'587'
 b'com.ubuntu.update-manager' b'window-width' b'600'
InstallationMedia: Ubuntu 12.04 LTS "Precise Pangolin" - Alpha amd64 (20111129.1)
PackageArchitecture: all
ProcEnviron:
 LANGUAGE=en_SG:en
 TERM=xterm
 PATH=(custom, no user)
 LANG=en_SG.UTF-8
 SHELL=/bin/bash
SourcePackage: update-manager
UpgradeStatus: No upgrade log present (probably fresh install)

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.

[Marc Boisvert-Dupras (bladetecltd)]

Same for me. Here's what I tried:
sudo -i
apt-get update
apt-get autoclean
apt-get autoremove
apt-get upgrade
apt-get dist-upgrade

Without success. All commands work except "apt-get dist-upgrade"