The way this is coded now has problems. If only Category:Playfields is on a page, the page will not display Category:Playfields as a link, but only the sentence that is edited onto the Category:Playfields. If both Category:Playfields and another category are on a page, the message disappears, and all Category links are displayed. I believe they return because the name Categories is plural for multiple links, and if it were Category: x, y, z, instead of Categories: x, y, z, the code would still be implementing the mistake.
This may be true for other categories as well, I have not come across any others yet. I would expect to find the problem in any category page that has text hand-written into it, instead of it being populated by names of articles given that categorization. Anarchangel 16:23, 12 February 2010 (UTC)
I put a link to Category:Playfields into the text. 16:33, 12 February 2010 (UTC)