Update: I can apply any texture pack on any world that is not a realm. I just cannot apply it to the realm. Also we made a copy of the realm, and have been playing on a regular non realm game, and it crashes every hour or so saying that the connection failure due to world being corrupted. We can close minecraft down and and reload it, and we dont lose any progress, but its still annoying.
Starting to get upset. Even if i copy the world and put it to a non realm world, we can play on the world with the city pack for about 5 minutes, then an error pops up, saying "lost connection due to world corruption". We can leave and reload the game and it loads, but it is making minecraft unplayable. Im really upset this problem hasnt even been addressed. At least revert and remove updates till you get this problem fixed, because it didnt start having this problem until the update for foxes came out.