So, fun story: The night before the patch I logged out on the Netherwing ledge area, where you are disguised as a Dragonmaw Orc (if you're doing the Netherwing quests, that is). My character is a female Orc huntress, but when I left the area, it kept the male Dragonmaw Orc disguise, even into Orgrimmar and Dalaran and such! People kept asking me how I was doing it.
The game is also currently refusing to let me dismount from my flying mount, also still with a Netherwing disguise stuck on it. Anywhere. Even in cities. It dismounts me briefly when I loot, shoot, or skin something, but then is instantly remounts me with no cast time. It's rather lulzy.
Maybe there is way to replicate still?