Before the latest Snow Leopard upgrade (10.6.2) came along, I was able to designate Adobe Reader 9.2 as the default pdf viewer in Firefox 3.5.5. No longer. Now, even though I have Adobe Reader specified in Firefox Applications as the preferred pdf reader, it automatically defaults to Preview. Personally I like Preview, but the United States Postal Service specifies AR as the preferred pdf program for those who wish to purchase and print mailing labels on-line. Has anyone else encountered this problem. Is there any fix? I'd even use Safari on the postal service site if I could set AR as the default pdf reader.