I had problems with safari, and setting, when i first jailbroke, but it turns out that it was a non ios 5 compatible app that i downloaded in cydia. If you're still on 4.3.3, I'm not sure why. maybe try to restore, and do another jailbreak.
I am on OS 5. I wonder if it was something i installed. Already restored so I guess I will reinstall all my cydia stuff one by one and hopefully narrow something down.
So i just reinstalled every cydia package that I was using one by one, and safari is still working now. I guess maybe something went wrong the first time I jailbroke. Glad its working now.