Frankly I use Camino mostly and only Safari now and then. I haven't applied the latest Security Update so I don't know if that might have anything to do with Safari acting up.
However I did find someone who had a problem after applying the latest update and found that one of her Safari plug-ins was causing a problem. You can deactivate them in the pref panel in Safari. Try that and see if it helps. If it does you will have to do an elimination trial to find the one that is causing the crash.
Creating a new account is always useful for testing problems. It leaves out any prefs you may have created which may be troublesome.
If none of this helps you may want to reinstall Safari. That is a bit of a chore but here's an Apple discussion on how to do it:
http://discussions.apple.com/message.jspa?...5165280#5165280