@seagul, wrong...you need to solve the hard to read one as this is the one G. knows and can compare. The other is a scanned word they send to many people and take the most typed word for it to translate books.
I thought it was other way round where you are helping them solve the one they can't read with their OCR and the other word is an easy control word that they know already. Sometimes I get confused though @Sven
Breaking the easy to read one would not be that hard...recaptcher would be no use than as every ocr can be configured to solve that easy one. The problem is the hard to read one which makes recaptcha breaking that difficult.
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Heres a vid.
http://www.youtube.com/watch?feature=player_embedded&v=fLr6mh9XpZc#!
Look forward to the day that CB can break recaptcha