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