I read this with some disbelief. It says that this is a preliminary result, but it also says that Australia are trying to appoint a replacement. I doubt a simple diuretic would be performance enhancing - I can see how sports that were affected by weight may have a problem with them, but not cricket.
I really find it hard to believe a player of his standing would intentionally cheat.
On another note, the opener WIndies win over SA rasied my eyebrow.
*** EDIT ***
This from ACB.