@ mvosx1094:
I don't think so because other people have the same problem with Bookmarks. But it could have something to do with my German Vista. I remember the Public Beta of Safari 3: It had so many problems on Non-English PC's, so maybe this is causing the problem...
Nevertheless, it's still a Beta, so I think they will fix it soon.
Regarding stability: I haven't had a crash so far, which is very cool because even Safari 3.2.2 Final crashes more than Safari 4 Beta .