I am not having any issues with my unit. What are some of the problems they are referring too?
1. Unable to register the device automatically (must be manually registered by Garmin in some cases which potentially voids the latest map guarantee)
2. Unable to update with WebUpdater to the latest firmware (currently 2.80)
3. Unable to see city names on map (firmware 2.80 corrects this)
4. Routes made with the computer are recalculated on import regardless of recalculation settings on the Zumo
5. Bluetooth connection issues
There may be others, but these have drawn the most attention. There is a lot of discussion on this at
https://www.zumoforums.com with several people acknowledging the hold on shipping new units out (some of the members have contacts at Garmin for testing purposes, etc.)