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.
:)
$\endgroup$