I had my phone jailbroken on 3.1.2 for a while (3G S). I was satisfied with it, although I decided to go clean on 3.1.3 and did a restore. Ever since this time I get constant freeze-ups in the SMS app. A few letters will type, and then it'll freeze up for at least 20+ seconds. I'll type on and it'll slowly add character by character and take minutes. If I add any more characters, it'll do the same; lag and then slowly catch up. I end up using the power button and then force quitting the app, or just turning off the phone and turning it back on. Within an hour the problem will come back. I'm on my third FRESH restore to 3.1.3. I have a few apps installed, most settings at default, and my mobileme account setup. That's it. No jailbreak. It occurs every time, after every fresh restore. ANY ideas?