bennor said:
Problem is, they want you to know your thesis topic before you start, yet if you're doing it part time then actually starting your thesis is 2 years away when you start the course... Seems pretty stupid, given how fast everything changes in the industry...

Most post-graduate study courses expect you to know your thesis topic before you start. For example, if you're applying for scholarships six months or so in advance you even have to have a viable proposal written.
But in my experience a LOT of people change their thesis topic between the time they apply for the scholarship/course and when they actually start the research. I came up with my phd topic pretty quickly, and have stuck to it, but I know people who changed their entire topic months into starting their thesis because they changed their minds, ran into problems in terms of ethics, participants etc ...
Changing your topic, especially before actually commencing the research, doesn't seem to be an issue in most universities

Academics accept that things change ... you might find out someone else is researching something very similar to you, you might find a topic that interests you more, in your field esp you might find that technological development means there is something new that needs to be researched, or you might just make massive changes to the methodology you initially proposed.
The whole rationale behind research is to add something to the field you're studying, so if what you initially wanted to study isn't the most appropriate thing to research when you actually start the thesis teh uni probably won't have a problem with that.
Asking you to have a topic planned is also one way to ascertain how serious you are about studying etc, and means that while you are doing your first bit (papers in Auckland I gather, it's a bit different at Victoria) you can be doing that initial researching for the written/dissertation bit. The sooner you start that shit the better - believe me
You could just check it out with one of the lecturers though.