www.irishshopper.com has USD $ as default but option for GB £, Euro and AUS and CAD $.

I was just checking and changed over on the front page to see prices in AUS $ and everything was 0. Went in to the Control Panel and clicked the link to update currencies and then two currencies appeared as 0. It seems to be every time I click update it changes and at least one currency shows a 0.

Australian Dollar AUD 0.00000000
Canadian Dollar CAD 1.06113005 Info
Euro EUR 0.80860502 Info
GB Pound GBP 0.00000000 Info
US Dollar (default) USD 1.00000000

What is causing this ?