My wife has no problems on her iPhone4. But IOS4.3 on my iPod touch has absolutely sucked the life out of it. It now seems to run slow, but worse is that I'm running into strange video artifacts now. When wireless sends or receives, the top that shows my signal strength blinks in what looks like a square box and it causes the whole screen to get dark/light. I've found ways to go back to 4.2.1, but I'm concerned it'll screw up the apps.. but my battery life is significantly down from before, SIGNIFICANTLY down, to the point where I can't get through an audiobook segment without grabbing a charger. ARGH