Wasn't one of Safari 4's features to sandbox different Safari tabs and windows so that if one site crashed it wouldn't bring down the whole app? I've been having a lot of general Safari crashes lately. I'm running it on Snow Leopard. I emptied my cache and deleted the majority of my cookies (only kept a few from reliable sites I visit often). Any advice? Does your Safari 4 crash often or am I seeing something specific to my system?