Please kindly navigate to Can PSTricks or others draw the 4 common tangent lines of 2 “disjoint” circles without having to do extra calculations? and see what happened there.

Image Error

I am not sure it is a bug but I chose bug tag.

This issue still exists in the following questions

  1. Tikz: using external images as building blocks.
  2. Length between nested lists
  3. LaTeX Math Jokes

3 Answers 3


You can just change




We have a network level "pro" account, so images shouldn't be disappearing, and they should be in both places actually.

  • + 1: Ok. Thanks for solving. Commented Jun 13, 2011 at 10:57
  • @xport it is odd, we will look into it Commented Jun 13, 2011 at 10:57
  • @Jeff: Yes. It is odd. I noticed some links without stack still work but only those two did not work. Thank you. Commented Jun 13, 2011 at 11:13
  • 2
    @Jeff: If this is a the case for more picture, could you rename the URLs automatically for all posts? Commented Jun 13, 2011 at 14:35
  • @Martin It is happening for more pictures. gaming.stackexchange.com/questions/10244/…
    – Wipqozn
    Commented Jun 13, 2011 at 17:14
  • @Jeff: I noticed that the issue still exists in tex.stackexchange.com/questions/2152/…. Commented Jun 16, 2011 at 1:19
  • @xport,Jeff: Indeed, both i.imgur.com/1n9Q1.png and i.sstatic.net/1n9Q1.png don't work. Commented Jun 16, 2011 at 11:38
  • @xport in that case, that was actual data loss from the provider a while ago. Hopefully isolated. Commented Jun 16, 2011 at 11:44
  • @Jeff: With access to the DB is should be possible to find all image references and check if they still exists, e.g. using a HEAD HTTP request. Then a (hopefully short) list of broken images could be posted to inform the authors to reupload them. Commented Jun 22, 2011 at 21:28
  • @Martin, @Jeff: Please also see my answer. Commented Jun 23, 2011 at 14:44
  • 1
    @Jeff: Would it be possible to implement #2 of How do we repair Gonzalo Medina's posts containing images? without bumping about 100 questions? Commented Jun 23, 2011 at 15:32

I found the solution to your example posts #2 and #3. What made me think is that it's both answers by Gonzalo Medina. What happened is this: Up until now, Gonzalo didn't use the "add image" link in the answer form, but he used the imgur homepage http://imgur.com/. (See the soon to be deleted conversation in the comments here).

Before you think "oh no, all his images are lost now": They aren't lost (yet), it just happened that all the imgur links with i.imgur.com were automatically changed to i.stack.imgur.com. (And all the images uploaded via the "add image" button were copied to that domain.) So if you remove stack. from those links, you see that the images are still there.

I only wonder what the best course of action is here, taking into account that Gonzalo has lots of answers that would have to be checked. See How do we repair Gonzalo Medina's posts containing images?

  • +1 @Hendrik: Gonzalo has 5 questions and 355 answers in total. Checking one item a day will be finished in about a year. :-) Commented Jun 23, 2011 at 14:54
  • @xport: Then it's too late! The images can be lost after only 6 months. See also my new meta question. Commented Jun 23, 2011 at 14:54

This shouldn't happen. AFAIK stackoverflow/stackexchange has a special imgur account which has no time limit on the images. Normally the images must be viewed at least once every six month, according to the imgur FAQ.

Maybe these images where uploaded using a different imgur account by the users themselves? If not then some of the SO admins should have a look on it.

Anyway, it should be best if the OP of these answers could reupload the images using the default imgur interface of TeX.SX.

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