Well, ElectricGary, you're the second person besides myself who is also having the haptic feedback issues - so I'm guessing with more people cropping up with the problem, we'll be able to get/identify some sort of a solution to this somewhat/seemingly isolated problem.
And in answer to your question, you definitely want to upgrade it to .494 atleast because that is stable, and works much better than the .107 ever did, in terms of both stability and battery life. Most people on this thread here are on it, and their phones are their daily, or somewhat daily drivers, for that matter. So yes, go ahead and make the jump, and tell us how it works out.
On that note though, secret question, how much would you be willing to part with the Icon for?
Joke, not joke.
-- W