I can't create a book under Internet Explorer 7 I can't create a book under Internet Explorer 7; when I click "add a new book" in Book outline, the browser shows, "To help protect your security, Internet Explorer blocked this site from downloading files to your computer. Click here for more options…."

When I click on "Download the file," the file name is "form8c01710d," and it contains { "status": false, "data": "" }.
Actually, it is an issue that continues into modern versions of IE as well.

If your site has the jQuery Update module running, http://drupal.org/node/860966 speaks of the issue; the real issue is found in comment #6.

The only reason I am following up on this post here is that it is has a high in Google search,  and I figured others are looking for how to solve the issue.