Hi,
I wrote a little step-by-step guide with screenshots to illustrate the upgrade process from Ubuntu 12.04 LTS Precise Pangolin to 12.10 Quantal Quetzal very precisely.
I hope this screenshot-guide is of use for those looking to upgrade to the latest (and IMHO greatest) version of Ubuntu
http://www.maknesium.de/guide-upgrade-ubuntu-from-12-04-lts-precise-pangolin-to-12-10-quantal-quetzal
I am looking forward to your feedback!
Maknesium