And I would add... how often do we hear about some security breach when it comes to Safari ? And still, we hear about at least 2 or 3 for Firefox and few more for IE. I don't have any problems with latest beta on my new iMac, and I was also pretty happy user of the version prior to this Beta one... I have to add, not sure about other things, but I can confirm that Flash plays at least 1.5 times faster (read: complex animations with a lot of vector tweenings inside are much, much smoother) on Safari than on any other browser.