I have installed BuddyPress on my local machine for testing. Using a PC running Windows XP with Apache and PHP installed on which I have tested many WordPress instillation's in the past without any problems I installed WordPress 3.0 and then the latest version of BuddyPress. I changed the permalinks as advised (to numeric) and then went to the front end to test. The front page displays just fine but that's all that works. I can click any link I like and all I get is a "Not Found" message. I can't access anything other than the front page.