So I upgraded my iPhone 4 to iOS 4.2.1 this afternoon like everyone else and now I'm having issues with it playing on my car stereo. I was having static issues when it played back previously and this update was supposed to fix it. Now when I connect it, my car stereo reads "iPod Error" and the iPhone says "iPhone not compatible with this device." So before there was static and now it doesn't even play. Anyone else have these issues? Is there a fix and I'm just stupid?