My experience is similar - not with being bumped, but with poor compensation - my daughter, who was a Platinum Flyer at the time, but a young 20 something year old, was flying in her 'usual' seat in Business SYD-LAX when she realised her Entertainment system was down. She was offered a move to Economy and $200 to compensate as they said the business cabins were full. She elected to remain in her Business seat and slept. We are Qantas fans and gave them the benefit of the doubt, however, this changed in our eyes, when she was returning - same seat, and the problem was there again!!! No compensation this time - again they claimed they could only move her to Economy. As both these flights had been paid at Full Fare, we were a bit unhappy and wonder if her young age had something to do with the inadequate response.