No when the dad is in his bedroom looking in the mirror there is a figure in background but if you look closely it is a cardborad cut out of a figure, like the ones you see in video shops. :-)
Well a figure is there,kind of looks like a boy in a top hat. He is in the window i think when the grandma is picking up the baby and refusing to baby sit. Its a long time since i've seen it but i think it is creepy!
As usual, the Snopes website comes up trumps in dispelling the myth. Sorry to disappoint all you ghosthunters, but it's actually a cardboard cut-out of Ted Danson. If you go to the link below, the second photo shows the still from the film, while the third more clearly shows both cardboard Ted and real Ted. Erm, for the benefit of all those familiar with Mr Danson's "acting" "talents", the cardboard one is on the left. :-)