I came back to Puzzling earlier today and had a strange feeling that Stack Overflow has invaded. Can you find out evidences of Stack Overflow's invasion from the following image?

Note: The answer is in the image above. Guessing "ciphered" meanings of the text description is a wrong way.

Hint 1

If you try to solve this puzzle just by examining what you see in the image (visual content, like text or figures), you're not doing it the right way.

Hint 2

The image is processed and is not a raw (original) screenshot. The expected solution is manually injected during the processing.

  • $\begingroup$ Hm, I think that rot13(vzthe qryrgrf vzntr zrgnqngn). $\endgroup$
    – EKons
    Oct 26, 2018 at 13:15
  • $\begingroup$ @EKons No that's not the case. I've verified that the expected solution is still valid. $\endgroup$
    – iBug
    Oct 26, 2018 at 14:26
  • $\begingroup$ Woohoo, I make an appearance in all the chat rooms $\endgroup$
    – Quintec
    Oct 26, 2018 at 15:35
  • $\begingroup$ @EKons Wanna check the accepted answer for the solution? :) $\endgroup$
    – iBug
    Oct 27, 2018 at 2:15
  • $\begingroup$ I read that as "Stack Overflow has been invaded" $\endgroup$ Oct 29, 2018 at 21:49

3 Answers 3


If you use...

https://osric.com/chris/steganography/decode.html to decode the image you get: result This clearly shows that the "Puzzling" logo on the top left has been changed to "Stack Overflow".

[Edit from OP:] Alternatively, you can use other software to extract the LSB of the red channel of the image, and you'll get the same result as shown above.

  • $\begingroup$ WOW! Never thought of that... Nice one! +1 $\endgroup$ Oct 27, 2018 at 3:14
  • $\begingroup$ @OmegaKrypton and that's what Hint 2 means $\endgroup$
    – iBug
    Oct 27, 2018 at 11:33
  • $\begingroup$ Oh I see now, +1 to the question as well! $\endgroup$ Oct 27, 2018 at 11:36

Just found out these were wrong : 1.

The Log in and sign up buttons should be on the left, instead of right, to the logos of feed, achievements, etc.


The word "Questions" should be boxed

Whereas this should be correct:

The “Hot network questions” are missing

  • $\begingroup$ did you read hint 2? $\endgroup$
    – iBug
    Oct 26, 2018 at 12:52
  • $\begingroup$ Oh yeah sorry @iBug $\endgroup$ Oct 26, 2018 at 13:39

I can clearly see the invasion.

Here is the screenshot:

enter image description here

  • 1
    $\begingroup$ Laugh out loud LOL $\endgroup$ Oct 26, 2018 at 13:38
  • 1
    $\begingroup$ LOL very creative! Still not the expected answer yet. $\endgroup$
    – iBug
    Oct 26, 2018 at 14:28

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