Safari Problems

I'm posting this here, hoping someone else might have run into some of these issues. Lately I've found that Safari has been flaking out on me bigtime. After running for a few hours it starts to do one of a few things. Either it stops opening up new pages (it just hangs at 'connecting to site'), or it puts up a spinning wheel and just sits there, forever as far as I can tell. This just started in the last week or so, so I'm not sure what's up. I'm wondering if maybe clearing out the cache might help, but I was wondering if anyone else has had problems like this.