There is nothing you can do.
This is common in Pub 2003 pages.
It is due to the technologies that version 2003 uses in it's pages.
Depending on the complexity of the page layout, the speed of the
browser/cpu, and the connection speed you may see this to some degree.
Simply put, 2003 is using absolute positioning which forces how the browser
places elements on the page, the browser may load items faster than it
processes the complex code and figures out where things go and which version
of images to render.