Firefox 3.6 and the million proxy password popups

I needed to authenticate with a proxy today and with Firefox 3.6 I constantly got user/password dialog boxes. Of course, this is annoying. Some searching lead me to an article on the Mozilla support site which mentions a setting (which you can reach via about:config) named network.auth.force-generic-ntlm which, when set from false to true, fixes a lot of these popups.