Safari, and anything that uses a web interface (Such as Itunes and App store), and 3rd party things like Dolphin, are all lagging horribly for me. I'm unable to do things. There's no smooth scrolling, with rubber band effect. And sometimes it just doesn't respond to key presses. I had to select something from a scroll wheel, and it wouldn't recognize me touching it at all. I'm on 5.1.1 and I've jailbroken, but I've restored my phone and I'm still having the same issue. Anyone else ever had this issue, and know how to fix it?