I'm truly disappointed with ubuntu 9.10 and 10.04 for amd64, they completely refuse to install or even run the live cd with 512mb ram. I upgraded to 2g and still many issues including some that come up in google searches far back as 2002. I won't bore you with the details but after several weeks of trying to get a 64 bit distro running on a desktop I am ready to put XP back on and sell it at a loss on craigslist. What's the point of releasing a distro if it is not compatible with the hardware you CLAIM IT IS compatible with???