expandplus.gif loads directly in the browser.
expandfake.gif also seems to load but it's transparent anyway. I can download it and open it in Photoshop.
Everything in the two installations (both 3.3.0) is the same - except that source code I think.
PS: oh, and I installed this about a week ago and the browse arrow icon was showing then. Since then I have had a database problem but that is resolved now, and all links show in the Gossamer Admin database view. Could this problem be database-related??