Currency problems

Hi, I'm Australian, building a site to operate in Australia, hosted in the US. Mostly selling to locals, but overseas as well. I can't see what configuration bit I've missed but no matter what I do, the prices are shown in $'s but instead of the prices in AUD I've given the products (AUD$50 say), it is showing the price still as S's but as if they were USA prices (so in this case $37.14 which is exactly the correct amount if you exchange 50 Aussie for US money). I've gone through Currencies and disabled all currencies except AUD, I've checked that AUD is set as the default currency and is set at a rate of 1.0000. Any ideas on what I've missed?

Sounds like a caching issue. Suggest clearing your system cache (system/cache). Make sure you don't delete the "index.html" file.