Aussies tend to leave out 'r' sounds in words or say it as if the word is spelt with an 'h' instead.

Park, mark, stark --> Pahk, mahk, stahk.
Which means for us the word 'source' is pronounced exactly the same as 'sauce'.

I once had a university tutor who had a particularly strong Aussie accent and she told us a story about a time she spoke at a conference in America and everyone mistook the word "today" for "to die". =]