When I click on certain link buttons at amazon.com a small window opens. The window is titled Opening ref=nb_sb_noss. In the window is the text "You have chosen to open ref=nb_sb_noss which is a: application/octet-stream from http://amazon.com" and it asks what I want to do with this file including opening or saving the file. If I close this window I can click again and get the normal activity intended by the link.