From the Aviation Herald:
"A Jetstar Airbus A320-200, registration VH-VFH performing flight JQ-978 from Cairns,QL to Perth,WA (Australia), was climbing out of Cairns' runway 15 when the crew reported a bird strike, stopped the climb at 6000 feet and returned to Cairns for a safe landing on runway 15 about 30 minutes after departure.The flight was cancelled, the passengers were rebooked onto other flights, some the next morning."
Screenshot from FlightAware showing the A320's flightpath
Jetstar Airbus A320 VH-VFH in May 2013
At the time of posting, the aircraft is still on the ground at Cairns.