My pc's on "go slow" at the moment Pete as I have exceeded my download quota so was not able to open your link unless I waited for yonks.

Here is another which I copied but have not read for the same reason;

http://www.perthnow.com.au/news/western-australia/short-term-diesel-fuel-shortage-in-perth-after-bp-import-query/story-fnhocxo3-1226937453184 

Apparently from the TV news there was a scare about discoloration of some supplies but it has now been found to be ok.  Diesel has run out at some servo's and regional areas due to this but supplies should be returned soon.

At worst, for anyone travelling, if diesel has run out in wherever you are and you can't continue on your journey, it means you might have to spend a few days extra wherever you are until supplies get back to normal...