I seem not to be able to flag anything on this computer. Whenever I click flag, I receive the little orange box saying “Unable to load popup - please try again (click on this box to dismiss)”.

I use Firefox with NoScript (with exceptions for SO, of course), but I tried to deactivate NoScript, no change. Firefox error console shows no error. I have even tried IE with the same result (which puzzles me the most). I was able to flag at home (on a different computer).

  • Versions of IE and Firefox? And have you tried with Chrome? And is this a new problem for you?
    – Benjol
    Mar 15, 2011 at 14:31
  • @Benjol - Firefox 3.6.15, IE 8 (x64, if that’s important…); it is not new, I am not sure whether I was ever able to flag anything on this computer or not; I remember the box has appeared before, I just thought it was a temporary glitch.
    – Mormegil
    Mar 15, 2011 at 14:48

2 Answers 2


I have resolved the problem: By debugging the JavaScript, I noticed there is a failed AJAX request for something like “/posts/popup/flag/123456?=987654”. I tried to access the page directly with the browser and received an empty page. So I tried using wget and received “HTTP/1.0 404 Dropped by firewall”.

So, obviously, our brain-damaged firewall is to blame here (I guess the “popup” part of the URL matched some ill-advised rule), no fault on SO side.

  • I have the same problem, for the same reason.
    – Ray
    Apr 12, 2011 at 8:01
  • thanks for the update, hopefully this will help others! Aug 6, 2011 at 4:10

Knowing nothing about javascript but nevertheless trying to debug it with Chrome I seem to find that in my case the culprit is Privoxy.


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