I haven't heard anything about this, but if it has happened I would think that it would be because of issues similar to those outlined by 'Mr Hat'. The cadets are all New Zealand employees and are 'based' in New Zealand but have been temporarily based in Australia due to the NZCAA saying 'no' to them flying here until they have 500 hours on line. Rumour I heard was that Jetstar were forging on with the cadet scheme despite misgivings from the NZ CAA as CASA had approved it, Jetstar knew talks were being held between CASA and NZCAA but carried on anyway until told they had to stop, I am guessing they have now been told to stop.