Just to follow up, I took my 08 RKC in for 1000 mile service and made sure that the high idle problem was added to the work order. I mentioned that HD had a new download to fix the problem (known to me because of HDtalking), but the service advisor gave me the look of " what are you talking about?" They held it for 2 extra days as they waited for a new "speed sensor".
Since I've had it back and put about 600 more miles on it, the high idle is as bad as ever. Every 3-5 starts, I'll have to go through the on-off 4 times routine.
I'll take it back soon. I printed a snipped copy of Glider's post regarding the HD Tech Bulletin that describes a new download to fix the problem, but after I re-read it, it mentions that a tuner cal over the update will wipe out the bug fix. I'm not sure that I got a true "tuner cal" with my Stage 1 upgrade so I don't whether or not the new flash will wipe the stage 1 flash or not.
I'd rather deal with the high idle than too lean a mixture.
Any advice?