See this answer: all the "rss" and "help us edit this wiki" (and possibly the subscribe link too?) point to the meta site -- whereas a click on the link proper goes to the parent site.
Reproducible on MSO: featured.
The tag link points to Stack Overflow, where it's pointless, but the bubble fetches links and excerpt from Meta Stack Overflow. Compare with the MSO tag featured.
Additionally, the SO tag becomes red, although it has no special meaning there.