If it's 2010, it could well be due to Eyafjallawhatchamacallit (those sigmets were fun to read out....). The idea that the airlines should have to compensate people for acts of god is ridiculous. Plane went tech? That's fair enough. Rostering messed up so crew are out of hours, also fair. But situations like the inbound diverting due to a sick passenger on board, then waiting ages for fuel or de icing or whatever at the diversion should not be covered.