I can't believe my luck! My favourite "look" for my (new) favourite CMS.
One of the things I really like about the theme is the tabs, like the ones that let you choose edit/discuss/etc. in Wikipedia. I see you have that on the Tikipedia page as well, but I can't figure out where to set them.
These links are displayed depending on what features are set for the wiki pages and what permissions the visitor has. This can be configured on the Administration > Wiki page (tiki-admin.php?page=wiki), and on the pages for setting group permissions and the particular page permissions, and so on.
Normally in Tiki these appear below the page content but were moved up in Tikipedia to emulate the Mediawiki/Wikipedia look (its default Monobook theme).
Is this what you were asking? If not, please post again.