Did anyone ever find the solution for this? If so, please post!
UPDATE: I figured it out. In the MGTwitterEngine.m, search for _clearCookies in initWithDelegate method. This is currently set to NO, change it to YES. In your action method for logging out the current user, call [_engine clearAccessToken]. Now run it, and voila, it works!
与恶龙缠斗过久,自身亦成为恶龙;凝视深渊过久,深渊将回以凝视…