The chat ads that are shown in the side bar of site pages incorrectly expect the user to always have a gravatar-based profile image:

var e = "http://www.gravatar.com/avatar/" + b.emailhash + "?s=23&d=identicon&r=PG"

This is incorrect behaviour for users who have Facebook or direct-upload profile images. As Szabolcs points out in chat, this is a particular problem for Facebook images which have their own query string, as it breaks the size argument to gravatar:

oversized broken gravatar

The JavaScript should check if the provided user emailhash value is a URL, and use that in place of the constructed gravatar URL when appropriate.

For the related issue of the icon being allowed to be too large, the generated <img> tag should be constrained to height="23" width="23" just in case.

  • I don't disagree, but what do you mean check if the emailhash is a URL? Your var e shows the url for the image, where b.emailhash is the unique id (hashed email) for the user, s=23 is asking for a 23 pixel image and d=identicon is what specifies the default image if no img exists (like in this case). They could choose to return a 404 in the case of no img (and do something else)... but apparently aren't. Jan 18, 2013 at 3:42
  • b.emailhash is an actual URL to the non-gravatar profile image in the above-mentioned cases, so you end up with http://www.gravatar.com/avatar/http://i.stack.imgur.com/ljxup.png?s=23&d=identicon&r=PG.
    – Tim Stone
    Jan 18, 2013 at 3:51
  • OK that makes total sense... I've only worked with the actual hashed email for generating gravatar URLs. Wasn't aware of what b.emailhash came out as... seems like a misnomer. Jan 18, 2013 at 3:53
  • @Richard only 50 points? The devs will just laugh at your face! ;) Mar 5, 2013 at 15:31
  • @ShaWizDowArd I clicked too fast and didnt bother to change it. It they don't fix it before the bounty period is up ill re bounty for 200 Mar 5, 2013 at 17:26
  • @Richard noble of you, but please let me. I have lots and honestly have no use of it over 20K... :-) Mar 5, 2013 at 19:03

1 Answer 1


The direct-upload images will be handled correctly after the next build; the Facebook images will be handled almost correctly – we continue to make the assumption that avatars are square (this is guaranteed for gravatars and direct-upload avatars); for the rare case that a user has a non-square Facebook avatar, the image will appear stretched in the chat ad.

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