I have a very specific issue that drives me crazy every day. I have Sync and have my iPhone connected. I use XM almost exclusively. XM has a replay feature that lets you listen to XM that has been queued by the unit just like a DVR does. However, anytime Sync does anything with my iPhone (if someone calls, or I use Siri, etc...) the point at which I am listening to XM gets reset to present time. I have no idea why. Does this happen to anyone else? Is there any work known around?