As with almost any software update, Apple has seemingly introduced a few new issues while ironing out a couple of others. Automotive forums around the web are ablaze with talk that iOS 4.1 has introduced any number of playback problems, with the bulk of complainers citing scratching, crackling or random disconnects when piping audio from their device to their vehicle via the dock connector. We've tested two iOS 4.1-equipped iPhone 4 handsets in two separate vehicles here at Engadget HQ, and we saw no quirks w