User blog comment:Dopp/New Profile Design Now Live Across All Wikis/@comment-4550074-20110819180142

Not sure if someone has reported this already but when you look at someone's contributions, as soon as you click one of the nav links: (Latest | Earliest) View (newer 100 | older 100) (20 | 50 | 100 | 250 | 500), you're profile masthead replaces that of the user whose contributions you are viewing. The contributions remain that of the user you are viewing.