Cheers for that heads-up.
I have just returned from a short hols abroad using a Garmin Zumo 595 on a motorbike. I did an update a couple of weeks before leaving (never ever do it the night before!!) and it appeared to be fine. However it decided to not play sound to the headphones saying it was not in a cradle (necessary for it to output), but it knew it was in the cradle because it auto boots when so powered and it was charging.
I found by trial and error that if I booted it up on battery and once running I fitted it into the cradle, the sound worked fine. This is a typical type of bug Garmin seems skilled at introducing when issuing an update, why do they do it?
I'll try another update and see if it sorts it out. The descriptions about Music Management and crashes with removable storage (where my music is stored) all sound like fixing a c0ck-up in an earlier update to me.
When it works well, it's fine. Garmin eh?