Hello, I am using a one page check out extension, my OC is 220.127.116.11. After I installed the extension, all works well except the postcode which should be required but not in my site,. But when you reload the check out page, the postcode will show the red star(required), then disappear. What is the problem. I also tested it on 1.5.4, works well, but on the 1.5.4 that I upgraded locally from currently 18.104.22.168, not works, postcode still not required.
Firebug shows this
<span class="required" id="payment-postcode-required" style="display: none;">*</span>