As tax filing time comes around again, and the now-ritual complaints about the Australian Tax Office's discrimination against Mac and Linux users are uttered, Crikey has learnt the Australian Tax Office is one of the few developed world tax offices that refuses to accept online tax form lodgement from non-Windows users.

The ATO paid a remarkable $32 million to Melbourne-based company DWS (owned by Danny "1 cent" Wallis) for its e-tax software, which will only operate on Windows systems and Windows emulators, although the ATO doesn't guarantee success with the latter.