Mortalpawn should been a wikimaster! He have reworked the mainpage into portals wich is now a LOTS easier for new users to navigate around the wikipage (no more big list of links). Waow, what a changes!
The Category tags is now a lots more in use (why did we not use it on rating pages to get these page automatic listed?).
I give Mortalpawn correct, the old "Contents/Index" now been phased out, and change the sidebar link to "Category:Index" instead. It simply easier to use this page, since users just can add a that tag into thier page, if needed (and then it automatic listed into the index page).
Otherwice I redirect the page into the new index in few days. But I guess the Admins should look into the first to checkout!
Look also on the talk:Main_Page link.
Nolinks on Content/Index is changed yet, but is now no longer in use.