Since upgrading the car to 4.3, I have found Slacker radio to be practically useless. It constantly stutters, stops and buffers and sometimes just sits and won't play at all. I have to resort to XM :crying: but was planning on letting my XM subscription lapse. I seem to have a good 3G signal (4 or 5 bars) so I attribute this to something to do with the software update. It worked perfectly on 4.2.