Could not calculate the upgrade

[Maris Radu]

After adding a new PPA ( deb http://ppa.launchpad.net/network-manager/ppa/ubuntu lucid main ) I received this error

Could not calculate the upgrade
An unresolvable problem occurred while calculating the upgrade.
Please report this bug against the 'update-manager' package and include the following error message:
'E:Error, pkgProblemResolver::Resolve generated breaks, this may be caused by held packages.'

If i remove or disable the PPA I just added the error disapears.

root@adu:~# lsb_release -rd
Description: Ubuntu 10.04.3 LTS
Release: 10.0
root@adu:~# uname -a
Linux adu 2.6.32-34-generic #77-Ubuntu SMP Tue Sep 13 19:40:53 UTC 2011 i686 GNU/Linux
root@adu:~# apt-cache policy update-manager
update-manager:
  Installed: 1:0.134.11
  Candidate: 1:0.134.11
  Version table:
 *** 1:0.134.11 0
        500 http://ro.archive.ubuntu.com/ubuntu/ lucid-updates/main Packages
        100 /var/lib/dpkg/status
     1:0.134.7 0
        500 http://ro.archive.ubuntu.com/ubuntu/ lucid/main Packages

[RedSingularity (redsingularity)]

The problem is its an unofficial package you are trying to use. It may be pulling packages onto the system that conflict with other already installed system packages. Closing report but feel free to leave more comments.
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