Fairing or handlebar mount? If the handlebar mount this is the first I remember reading of that mount having problems. If the fairing mount what are you doing about the mount hole?
Twolanerider,
The HD unit I had was the fairing mount system. I had several call with Garmin about the problem, and they said they created a new cradle, which they sent me but looked the same, and they said HD created a new fairing mount part. When I talked to HD, they said " we don't have a new part". So, I used the new cradle with the original mount, and guess what; it fell off again!!

I was able to catch it when it fell off, and I went to the dealer and said enough...I want my $ back, and they agreed. Unfortunately I now have holes in my inner fairing, which should partially be covered with a new dash pad, but the top hole I still have to figure out what I can do...maybe a medallion or some custome paint work. Not sure yet. As far as Garmin goes, they have great customer service, but when trying to talk to their engineering, it's been impossible! I thought they would love to hear from their users, but have never been contacted or put through to them. Anyway, thought I had had enough, and am going to the handlebar mount. Hopefully I won't have anymore issues. I love having the GPS and it really came in handy on my trip last summer to Sturgis.