Thread:Project:Support desk/.patrollink is not visible in vector and monobook style

I have recently updated to version 1.20.2 and turned on the patrol-mechanic (which I had previously disabled).

While testing, I realised, that there isn't a link to "Mark as patrolled" when I look at the differences. However, looking at the HTML Source, there is supposed to be a link. The HTML reads: &#160; [Als kontrolliert markieren]

This seems to be the proper link, and if I follow it, the page is marked as patrolled. However, I have no clue, as to why the link doesn't show in the page. I figured that the whole is set to style="visibility:none;" somewhere, but I have no clue as to why or when.

There is no mw-diff-ntitle4 class defined, as far as I can find and there isn't any visibility change for class="patrollink" (there isn't even span.patrollink only div.patrollink in the CSS files of monobook, and no reference I could find in the vector css files).

Any ideas about how this happens ?

Best regards, Heinrich

ps.: Sorry, that I can't provide access to the wiki or the patrol user rights.