Macbook self-assigned IP — some solutions. This is by far the most annoying OS X bug. I’ve had it in 4 or 5 different ways with both of my Macbooks.
If you’re having the same problem I was with your Mac and the latest versions of Firefox 2.0.0.7 and Flash 9.0.47.0 causing the browser to crash everytime you encountered Flash on a site, just rollback your version of Firefox to 2.0.0.2 and everything will work again.