BUG: During the quest Klavens Tower, you get the "Touch of Zanzil" debuff - which states on mouse-over that it prevents stealth / invisible. - but it doesn't. Still able to stealth normally.
Expected: Should receive a message declaring unable to stealth - and not be able to sneak or go invis by any means (skills, pots, etc)
Mangos Two (WotLK)