Recall was for O2 sensor parameters, client's were getting service engine soon warnings intermittently and ultimately O2 sensors and/or cat's may have had to be replaced prematurely as a result. I have not had anyone complain to me yet about this concern. Are the symptoms you guys are having only happening during the warm up phase? Or all the time? I don't think the programming is supposed to effect anything once the car leaves the warm up phase, so in theory the car should run the same as always once warmed up. The other thing I'll say is that the adaptive probably get reset with the reprogramming, so that would alter the way the engine/trans operates until it "relearns" you particular driving habits.