Just got in from work(works van) and as i walked to my door i noticed the car i have on hire untill today (Vauxhall astra) the two front windows were down half way both exactly the same, i know for a fact they were closed yesterday as i didn't open them as i used the air con, the key fob was just sitting on the shelf at home and was not put in my pocket from locking door to entering the house, my BMW 330 used to do this from time to time, is this still a common problem.