Looking through the release notes for v1.3, I don’t see any backwards incompatible issues that affect me. As for new features, there is an index that is now used on the session table that I can add, and the much heralded class-based views are now available.
Looking through the deprecation list, I did find a couple of things to check. First, an upcoming change to the url template tag warrants a look through my code, and the eventual removal of the function-based generic views means that I can either fix them now or during the next upgrade.
Hopefully, this will be quick, not only on my first, uncomplicated application, but the more complicated ones I’ve written more recently.