I just noticed the other day while I was driving & listening to my iPhone 4 through my car speakers..I had the switch on so when a text came through it made a really weird rewind/pause kind of sound then faded into the music. Normally, the text will just fade into the music but in this case it made a weird skip sound. While listening to music through my headphones (apple ear buds), this problem does not exist..only when listening to my iPhone 4 in my car. I tried it with my girlfriends iPhone 4 in my car and she does not have this problem..I restored my iPhone 4 from a back up but still having this problem. Its just real annoying when my volume is up high and a text comes in & makes this annoying sound. Should I take this to the apple store or can I avoid that? Any suggestions/advice would be much appreciated!