Seems as though Jetstar are doctoring information used by the Farehunter site. See the SMH http://www.smh.com.au/news/business/a-cheap-shot-but-dont-ask-jetstar/2006/02/26/1140888748254.html
JETSTAR, the airline that prides itself on offering cut-price fares, has nobbled attempts by a travel website to compare the cheapest domestic airfares on the market.
Since late 2004, the website, FareHunter, has allowed consumers to compare the cheapest airfares provided by Jetstar, Virgin Blue and Qantas, saving them the trouble of visiting the airlines' websites.
But the founder of FareHunter says his website has been "crippled" after Jetstar recently started providing incomplete and doctored information.