For danpost

I do not know why you are getting that displayed in that way. You are not even getting my full author name on your screen (it is missing the last letter; 'by danpos' instead of 'by danpost'). I do not know if it is default setting or screen magnification or what; but it is something with your computer, not with the scenario.

Well, being the world is only 600 pixels wide, with the big blue frame centered in the world and the actor images being drawn on the frame at an offset of 310, your actor images should not be left of center in the world (which they are appearing to be). Even if the actor images were being drawn on the background of the world at 310, they would end up right of center in the world. My guess is it has something to do with the way the frame is being constructed on different systems or different versions of Greenfoot. It looks like your blue framed area is larger than the world on your systems, where I have gray border all around the frame on mine. So, your frames are larger than the world, where mine is not (go figure!).

The image with the blue frame on the help screen is rendered with a size of (556, 580) on my system (I do not know why it would be different for anyone else). I did change the draw location for the actor images from an absolute offset from left of the frame image to an absolute offset from the center of the frame image (hope that helped).