To do size control on a Flash site, you usually need the Flash movie to scale up and down automatically along with the window size. The approach I took: put a container div in place to hold it, with the Flash set to 100% width and height inside. JS listens for browser window resizing and then resets the size of the container div. The Flash side listens for stage changes and moves views to the corresponding positions, etc. The problem showed up in the jQuery window-resize listener. Code: