i have no problems with mine in other head units. it does have a lot to do with the media though. i have had the highest success rate with sony and memorex. but, i like to use audio extractor to get all the music on my hard drive so that i wont have a problem with scratches causing an error. its possible that this might have something to do with it. when i have the songs on my hd, i run them at 6x, but if they are mp3 or from a cd, 4x only. i have a mac too
