Linus Torvalds, leader of the cult of Linux, took a swipe at Apple's OS X and Microsoft Vista in the same breath at a conference in Australia last week. Speaking at the linux.conf.au conference in Melbourne, Australia, a few weeks ago, Torvalds called Leopard 'utter crap' and bashed the proprietary OS makers for being greedy, according to Australian reporter Nick Miller in the The Age. "I don't think they're equally flawed - I think Leopard is a much better system," Torvalds said. "(But) OS X in some ways is actually worse than Windows to program for. Their file system is complete and utter crap, which is scary." He also scoffed at his rivals' practice of revenue-through-renewal by launching upgrades that require new purchases. "An operating system should be completely invisible," Torvalds said. "To Microsoft and Apple (it is) a way to control the whole environment - to force people to upgrade their applications and hardware."