Boofo: I did click the button underneath.
KeyCaptcha: I think part of my problem with the hunters was that I read the instruction "place each hunter right to a dog" as simply "pair them", not "place the hunter behind the dog" as the revised Captcha shows.
Attachment 124195
However, other puzzles are not as strict. Here's two more that generated
no errors:
Attachment 124196 Attachment 124197