[Redirection plugin] Comment URL interpreted as 404

I noticed in my 404 errors page that most (not all) of the comment URLs are interpreted as 404 pages. Nevertheless, when I click the actual link from the redirection’s log page, the page opens just fine.

Such an example is http://www.mediasinfo.ro/constantin-nadolu-si-catalin-iosef-implicati-in-trafic-de-droguri-provenind-din-america-de-sud-au-fost-trimisi-in-judecata/2011/05/07/#comment-4582

Any idea why this happens? Should I even be worried?