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Comment by icebraining | Hacker News Reader

What do you mean? It's serving me a PNG image.

Are you sure? Zooming in here I see JPEG artifacts. Imgur also often lies about the image format in the URL.

ImageMagick's `identify` claims it's a PNG:

    $ curl -OL https://i.imgur.com/dHIaRh1.png
    $ identify dHIaRh1.png
    dHIaRh1.png PNG 512x512 512x512+0+0 8-bit sRGB 3545B 0.000u 0:00.000

Yes, I can reproduce that. I get served different versions depending on device/browser, and on my phone I got a 7883 byte JPEG!