Well, I just got it about a month and ahalf ago. I'm assuming its still got the original fuel filter, cold to mild (55 high/33 low), had been running 10 to 20 minutes, and sitting still for several minutes. AC was probably on as it has been cycling the defrost with the climate controls in auto.
I have also noticed sometimes you really have to push the brake down hard as it occationally pushes forward at a stop. Sometimes more than others.