Currently Being ModeratedJan 14, 2012 9:00 PM (in response to himoura)
Im experiencing the same issue with my iphone 4 but it didnt start until I updated my software to iOS 5.0.1. Not sure if that is the actual cause of problem but it seems that way. I don't think the screen protector would affect the sensitivity but who knows. It is frustrating though especially when you're trying to type fast or playing games that require speed.