I ran a quick search for the issue I just posted about in another thread, but didn't find anything quite like what I experienced today (and I was not using XM). For about 5 minutes, the infotainment screen on the center dash froze up and was non-responsive. It eventually did some sort of complete auto-reboot starting at the "H" symbol and became functional again. When it happened, I was in the navigation menu, looking at the features available while underway in the navigation system. Anyone else experienced this?