From a Cricinfo article re the "racial abuse":
In the first Test at Perth, Makhaya Ntini, Ashwell Prince, Garnett Kruger and Shaun Pollock were taunted in Afrikaans as "kaffirs" or "kaffir brothers". This prompted Ali Bacher, former South African captain and chief executive, to call for life bans for offenders. In the second Test in Melbourne a man was ejected from the ground for making racist and offensive comments towards Nel
I'm not really sure how many Aussie fans know how to speak Afrikaans...
Edit:
Play's just started.