You might try deleting the cache folder in the retail subfolder of your WoW installation (I also moved the WTF folder and Addons folder out to the desktop, but then put them back after loading the game, checking for the DF button, and then closing the game again, so IDK if that part was really necessary).
I had to do that just now to see the Dragon Isles minimap button again. IDK about the rest of it—the Rostrum or the portals—but the button is back, and the WQ rewards are displaying properly now as well.