Today, while submitting an answer in SO, I got this CAPTCHA.

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After entering the displayed number, it showed me this error.

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So, I closed CAPTCHA submission form, but to my surprise found that the answer was already posted.

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Possibly a bug? I have encountered this a couple of times before. But this time I made sure to take the screenshots and draw a freehand circle.

  • 1
    Are you sure you are not a bot? – qwertynl Jan 15 '14 at 16:22

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