Even though Ancestry support promises an ancestry quickly, I have not heard from Ancestry support at all. I have a suggestion for others who are having the same problem. Besides Mozilla Firefox, another browswer is Opera. I just downloaded that one and can open the census images there as well as I can with Mozilla. I am inclined to think this is a problem with Microsoft and Ancestry. The other browsers I use--AOL, IE 6 and Netscape all come with Microsoft. The other two do not. I would advise any having problems with the viewer to use Firefox and Opera until Ancestry acknowledges the problem and fixes it. As others clear their cache, this may happen to them too.