Could not calculate the upgrade

[Veronica Franklin]

1. Ubuntu 9.10 Karmic Koala released Oct. 2009 supported until April 2011 ((oops!))
2. Attempting to upgrade to Ubuntu 10.04.3 LTS
3. Hoped it would upgrade through update manager.
4. Error message:
"Could not calculate upgrade. An unresolvable problem occurred while calculating the upgrade:
The package 'skype-common' is marked for removal but it is in the removal blacklist.

 This can be caused by:
 * Upgrading to a pre-release version of Ubuntu
 * Running the current pre-release version of Ubuntu
 * Unofficial software packages not provided by Ubuntu

If none of this applies, then please report this bug against the 'update-manager' package and include the files in /var/log/dist-upgrade/ in the bug report."

ProblemType: Bug
Architecture: amd64
Date: Fri Aug 26 12:29:23 2011
DistroRelease: Ubuntu 9.10
ExecutablePath: /usr/bin/yelp
NonfreeKernelModules: fglrx
Package: yelp 2.28.0-0ubuntu2.9.10.1
ProcEnviron:
 LANG=en_US.UTF-8
 SHELL=/bin/bash
ProcVersionSignature: Ubuntu 2.6.31-23.75-generic
SourcePackage: yelp
Uname: Linux 2.6.31-23-generic x86_64
XsessionErrors:
 (gnome-settings-daemon:2411): GLib-CRITICAL **: g_propagate_error: assertion `src != NULL' failed
 (gnome-settings-daemon:2411): GLib-CRITICAL **: g_propagate_error: assertion `src != NULL' failed
 (nautilus:2487): Eel-CRITICAL **: eel_preferences_get_boolean: assertion `preferences_is_initialized ()' failed
 (polkit-gnome-authentication-agent-1:2532): GLib-CRITICAL **: g_once_init_leave: assertion `initialization_value != 0' failed
 (firefox-bin:4000): GLib-WARNING **: g_set_prgname() called multiple times

[Launchpad Janitor (janitor)]

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