recently, Safari (v1.1.1 in 10.3.1) has been acting quite queerly. when i first start it up, it works fine. but then, either a certain amount of web pages or time later, it stops working, as if i were disconnected from the internet. however, this is not the case (i'm still talking on iChat w/people while this happens). Then, to get it working, i have to quit safari and then open it again, only for this to happen all over again. what is going on?