These 2 attributes drive me crazy. Really:
var mc:MovieClip = new MovieClip();
mc.x=10;
mc.y=20;
mc.height=100;
mc.width=200;
addChild(mc);
trace(all the parameters) traces x and y correct, but not height and width, i can’t imagine why and of course google offered me a help, which was useless cause no solution was found. I would be really happy to know why 
