Here is what DA said when I ask about the update to the engine for the idle problem.

There are actually two ways of fixing the problem that you are talking about. The first way is to lean out the low end about another 1/16 of a turn, and that should do it. If you still seem to have the problem you can send the engine to us and we can update it for you. Basically what the update consists of is a change in location of the crank case pressure. By changing that position the fuel is not allowed to puddle up in the carb block like it used to.