I have Safari Version 4 Developer Preview (5526.11.2). I've been running it for a couple of days now and haven't noticed any issues.. EXCEPT for when I go to this ifixit.com link http://www.ifixit.com/Guide/First-Look/Mac/MacBook-Unibody/Page-3 and click on the Macbook Pro link under the ifixtit News column on the right... My Safari just crashes and has to be restarted. I've tried again and again, with the same result. I can't figure out what's going on... Please try this and let me know if you're getting the same thing. What other bugs have you noticed so far?