If you think you might have noticed a typo/error in a paper of which I am an author, I would be very grateful to know about it. I would consider it the nicest possible gesture if you were to send me an email or to fill out this webform.
While I am the primary beneficiary of such a favor, it might also spare another reader unnecessary confusion. This is an experimental system, and my most optimistic hope is that it improves our community's collective body of work.