When do you get this message? When voting for reviews through either the latest reviews page or the download info page I do not get that message.

That message should occur only if the http referrer does not contain 'jazz2online' to avoid people collecting helpful votes by tricking people into clicking links. Is it possible you were clicking the link from a different site, or have reporting referrers to sites off in your browser settings?

I had never really considered people that don't broadcast a HTTP_REFERER (sic from http standard) header to the site. If anyone has an alternative that also supports preventing abuse while not needing this header, let me know.