One of the things that I've encountered is that after updating my maps or adding maps to my Zumo 665, I now have a problem where my Zumo says it can't find my MP3 music files part of the time. I have to turn it on and off a few times in order for it to finally find my music. I did a reset as was recommended on the Zumo forums but that hasn't helped. Has anyone else out there had this problem and found a solution to it? Please share, I'd love to correct this annoying problem with my unit.