After upgrading to iOS 4 and iPhone 4, the widescreen button (on/off) setting no longer has any effect on videos played on my TV. I'm using the exact same Apple cable I was using before, and the same TV. I'm playing widescreen content rented from the iTunes store. But regardless of whether the widescreen switch is on or off, it plays in 4:3 on my TV. This looks terrible and distorted. I've already sold my 3GS, so I can't determine whether the problem is iOS4 or the iPhone 4. I'm using the Apple Composite AV cable, which is supposed to be compatible with iPhone 4. Anyone else having this problem? Any solutions? I have updated to 4.0.1.