So, without any conscious act on my part, my 12.04 system is prompting me for a partial upgrade on every run of Update Manager, which makes me thing it's trying to do a dist-upgrade. It's not what I want - I want to stay on 12.04. Is there a way to stop it from trying to do this upgrade?
If I run
I getCode:sudo apt-get update && sudo apt-get upgrade
Code:0 upgraded, 0 newly installed, 0 to remove and 0 not upgraded.
Screenshot of the error message: