In the IRC channels the links to diffs include an &rcid= part, which was used to enable patrolling from it I guess. However, when I click any diff now it shows a [Mark as patrolled] link, even for edits admins and autopatrolled users. This makes it kind of pointless. And since this part was added to the links, [Mark as patrolled] links have started appearing even when there is no &rcid= (when the revision is not patrolled) from Special:Recentchanges. In othec words, the rcid part of the URL is superfluous, and should be removed because it decreases the usability of the links.
Sorry for not being able to explain it better, but I hope I got the meaning across.
Version: unspecified
Severity: enhancement