Tamed Ocelots regain Untamed Ocelot texture
When I loaded one of my pre-0.16 worlds in 0.16.0 all of my cats had regained the ocelot pattern. They still act as cats - they meow and I can tell them to sit or stand. Feeding them fish doesn't change their markings.
They were all orange tabbies before the update and neither of my other worlds has cats so I'm not sure if this affects all markings. Testing in a new world in creative mode doesn't show any abnormalities - I can produce all three markings by taming spawned ocelots.