reCaptcha accepts wrong answers sometimes

Posted by frankadelic on Stack Overflow See other posts from Stack Overflow or by frankadelic
Published on 2010-06-17T03:47:15Z Indexed on 2010/06/17 3:53 UTC
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We are using recaptcha ASP.NET control:

http://recaptcha.net/plugins/aspnet/

However, we find that in some situations, recaptcha accepts answers which are clearly wrong.

For example, recaptcha provided these words:

of purser

The tester typed in the following:

o purser

..but Page.IsValid returned true! Is this a known issue with recaptcha?

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