Last week I updated my phone to iOS 4.3. Quickly I found out that all of a sudden I had very faint horizontal lines all over my screen, quite like scan lines or interlacing. After some googling around I came across the following site: http://thedice.net/iphone4/ This is exactly the problem I had. I have solved this by downgrading to 4.2.1, so the problems were definitely caused by iOS 4.3. Does anybody else have or had this issue?