Some of the errors are, I think, format (and probably platform revision) specific - a character code not used by version x.zy of ADE, or Amazon's software, or css/html not supported (or incorrectly supported) in that version, or whatever. I don't think the author can fix these. Some look to be OCR errors, and would be present in all formats; again, the author can but pass that info on the the publisher. Some are probably the author's fault.
I, for one, would appreciate efforts by a publisher to correct errors and get updates distributed; but I don't think it would make me buy differently, since I buy by author.