This week Google launched its new top bar, which changed Google Reader's DOM making the userContent rules I explained last month useless.

Well, here's the fix for the new Topbar. This time it is much easier:

/* userContent.css */
@-moz-document url-prefix(http://www.google.com/reader/) {
    #gb {
    display: none;
    }
}

Now you have more reading space in Google reader.