Hey SuperJuice, having a small issue with the Aust Post Module with 188.8.131.52 When I do a test checkout (localhost Wamp) I have to press the Continue Button 5 or six times before the module kicks in. Reinstalled Seems OK now. SOLVED
The 'pressing 5 times to make it work' isn't the module, it is the speed that the DRC gateway returns. At times it can be slow, something that Australia Post is apparently addressing, it may also be the speed of DNS resolution
Absolutely nothing in the way the module interfaces with Australia Post has changed (10+ versions back), the issue is that in newer versions of OpenCart the checkout uses an AJAX style checkout so the delay is much more visible to the user. In previous versions because there was a post back / refresh of the page the DRC delays went largely unnoticed. I am not sure if there is an Ajax timeout coded in, but that may potentially be the problem. If it returns a value it is working, I don't have any code in there that says "on the 5th click work". If you click and wait it should return when DRC returns the postage estimate, I can't speed that up.
Other things to check are the speed of connectivity from your webhost to the DRC gateway, the speed of your DNS resolution (this sounds like the issue you had.. once the name was cached it worked quicker etc.), the load on the box etc. etc. To speed up DNS you could even add the DRC name resolution to your hosts file so it doesn't need the DNS request at all.
I haven't had any reports of the estimate not displaying, so I am unsure what the issue is. Can you confirm that you are using 184.108.40.206u1?