Current returns policies still protect the buyer from faulty goods, no worries there.
They are chain wide policies and major stores all have nearly the same policies.
You just have to know that you are indeed entitled to return faulty goods and don't let anyone tell you otherwise.
Examples:
Target http://www.target.com.au/html/refund...ped_refund.htm
Target will accept product returns where:
• The product is faulty or the product is not fit for the purpose goods of that kind are commonly bought.
• The product does not match the sample or description.
Kmart http://www.kmart.com.au/ReturnsPolicy.aspx
Kmart will accept product returns and provide you with an exchange voucher, refund or repair where:
The product is faulty or is not of merchantable quality, or
The product is not fit for its intended purpose, or
The product does not match the sample or our description; and
You can present your Kmart register receipt or other adequate proof of purchase.