Women Trailing Men in Postgraduate Job Earnings

Australian postgraduates seem to be enjoying the best career and earning prospects in the world. However, women in general appear to be falling behind men when it comes to earning capacity as postgraduates. There is an interesting article on this here: http://www.theage.com.au/news/National/Postgrad-women-trailing-men-in-salaries/2007/09/25/1190486235877.html. Thoughts are welcome.