I'm a little sad. I was really beginning to enjoy using Safari and the Webkit nightlies, but ever since the Mac OS X 10.5.6 update and Safari 3.2.1, I've been experiencing odd "cookie forgetfulness". When I visit websites that usually keep me logged in for a long period of time, they log me out pretty quickly nowadays.
Some sites don't even let me do simple in-page tasks that occur via AJAX methods, since the cookies have been "forgotten" by then! Clicking on other links brings me to a pages where I must log in again. And I'm not the only one who has experienced this problem: others have as well.
Fortunately, I can use Firefox, which has become a pretty nice browser in its own right. Time will tell if I will stick with Firefox for the long run, or if I'll migrate back over to Safari once it's no longer brain-dead on my box. I'll at least send a bug report for it!