The title pretty much sums it up. But I'll elaborate on the problem. (check below flash, move with the arrow keys, up is jump)
Check this flash first to see my problem.
Now, as you can see. You can easily outrun the background. I dont understand why. Here is a little piece of the action script I use to move the character and the background (this is in the character movieclip, the backgrounds instance name is "screen"):
vx*=friction;
this._x+=vx;
_root.screen._x-=vx;
As you can see, the background should move exacly like the character, but it doesnt (friction is a number, 0.87, which I use to make the movement smooth). I'm puzzled, can someone help me figure out what is wrong?