My SEL's system is starting to be more erratic, not showing the street on the Home scrren in the Navigation quadrant, then not showing the Entertainment content ( what was playing) on the small driver right hand screen, showing blank white blocks when Sirius pre-sets were used on the Home screen, and last, just drove about 6 miles with a totally blacked out screen on the mid-dash. I have complained to the dealer about this previously, they cleared/reeset memory as a chance of fixing it, which also cleared lifetime Regen miles driven ??? I called the MySynch help number and talked with the rep about the update to 3.5.1 that is overdue. I have 3.1.3 currently, as my Cmax was built in December. The rep said the release had not been posted for Cmax hybrid, but that the Fusion hybrid was just released and C-Max shoudl be there any day. She also said Ford would mail notification to each owner when the release was made and ready for download. I guess I will let it rest for the night and see if it re-boots/resets/dows Windows Update/goes blue screen of death. I am really challenged to know how this software, which has been around and bemoaned for years, is still this difficult to make work. We have a nav/tech system on my wife's Genesis and if over two years of driving, only had one hiccup, which was fxed by powering off the vehicle and restarting it so the screen displayed ok. I really liek the Cmax, but these quirks ( and now the intermittent Check Engine light when starting) are making me uneasy.