I have started a howto designed to cover problems encountered when upgrading to SME 7.2:
http://wiki.contribs.org/Updating_to_SME_7.2#Updating_to_SME_7.2So far, I emphasize getting the user's yum repository configuration back in line with the defaults, as I think many users who installed from an iso prior to SME 7.1 still don't have the
Centos - os and
Centos - updates repositories enabled as they now should.
I invite all to add their own problems (& solutions!)...