Sorry - It was late, and I should have been more descriptive. By normal driving, I mean I'm not trying to qualify ....

Just moderate throttle with smooth input. I'll try and give a better description.
At about 30 mph, if I let off the accelerator and am preparing to brake (or starting to brake) and the need to brake goes away (i.e. light turns green or traffic starts to move again) if I have not come to a complete stop and am still moving around 15mph or so, when I go to accelerate back to speed (and using smooth, moderate throttle) the engine rpm will come up, like the trans is in neutral, and then BANG into gear. It won't jerk your neck, but you definitely feel the trans slam back into gear. This doesn't happen all the time in this situation, but some of the times. It is definitely worrisome, considering I only have about 450 miles so far ... has anyone else had this issue? If so, what was the resolution / outcome?
The build date of the trans was sometime in May of 2006 (1456? I forgot the exact number) and the TCM has a sticker showing a software update ....