those of you using desktop mode with the basic themes (light or dark) will notice the topic list view (within a category, or the "latest" topics link, for example) has changed a bit now, with the topic (thread) title column before the topic author - this is the only difference - the columns are switched. this was in a recent Discourse update and in a way it makes logical sense to have it like this.
the mobile view should not been affected, and the links to user cards are now fixed for some mobile users (weren't working on some mobile devices).
if you are currently using either of the two football themes, you will notice no change because i already setup that updated forum template before enabling those themes.