A bit more info that I have discovered and some other stuff passed on to me by someone else in the same boat as me:

The new Tabcorp site uses a combination of "cookies" and the "referral address" (this is some information that your web browser sends to the website that tells the website whether you have entered the address directly or clicked on a link and if so where that link was) to intentionally try to block anyone using automated software from retrieving information from their website.

The way that have done it, however, has also stopped a lot of normal users if they have higher security settings on their PC than the standard or if they are not using a recent version of Internet Explorer. A LOT of users who want to protect their online privacy by turning off "cookies" within their browser will be unable to use the new site.

My friend, who has spoken to someone within Tabcorp, has reported that Tabcorp was not aware of the number of users who were using data retrieval software. According to this source Tabcorp are reconsidering the policy and may look at re-opening the old site for those who cant access the new one.

Personally I am not holding my breath as I doubt anything will be done. I am sure the intention was to cut the amount of traffic to their website by eliminating the automated access component and who cares if it pi**es a whole lot of people off! No doubt the customer service people would like the problem fixed but the big bosses don't have to take the calls so they will only be looking at the bottom line in terms of dollars spent on internet bandwidth charges.