The upgrade from slack 12.1 to slack 12.2 went fairly well. There were only a few issues, mostly with third party packages.
On the first boot, rc.serial made a lot of output complaining of nonexistant devices. But this was only a one time occurrence.
fbpager no longer works with the new fluxbox, but there has been some recent development with fbpager so there may be a new release at some point that will solve this. Tried fluxter with no success. For now I have switched...