Space X on Monday: "A decision on whether or not to attempt launch on Wednesday will be provided tomorrow evening... if the nozzle had to be replaced, the company would aim for a Friday launch. SpaceX has a launch window that will remain open until Saturday." It's a nozzle extension used for extra thrust and not needed on this flight, but engineers want to make sure it's not a symptom of more critical cracking elsewhere.
On Tuesday: It all looks good, going for Wednesday liftoff. Trying for two orbits for Dragon and then a water landing.
Thunderbirds are Go!