After your package information was updated the essential package 'ubuntu-minimal' can not be found anymore.
This indicates a serious error, please report this bug against the 'update-manager' package and include the files in /var/log/dist-upgrade/ in the bug report.
And upgrade was failed.
See /var/log/dist-upgrade/20100906-1238/main.log attached.
Binary package hint: update-manager
During upgrade I've got the message:
Invalid package information
After your package information was updated the essential package 'ubuntu-minimal' can not be found anymore. dist-upgrade/ in the bug report.
This indicates a serious error, please report this bug against the 'update-manager' package and include the files in /var/log/
And upgrade was failed. dist-upgrade/ 20100906- 1238/main. log attached.
See /var/log/