Have a read through any month's ATSB incident reports, theres usually a few incidents/diversions etc from 737s, 747s, A320s etc (all OZ registered). Whats happening here is that the media is latching onto anything that happens which is out of the ordinary with a QF plane since the oxy bottle incident to drive up sensationalism/sales.
Pity that this is the sort of garbage that gets fed to the general public.
Side note - planes are generally very low during takeoff
