User blog comment:BertH/Layout and navigation updates coming October 3/@comment-5072107-20120920192532

"Our click tracking shows more frequent use of the custom items on the wiki navigation for wikis with this newer style."

That (^^) is becuase you start every wiki with the new format and people don't bother to change it AND becuase half the wikis with the older version are inactive.

If you must change the navigation, allow users to change the 'On the Wiki' section, because it is currently unchangeable and that gives admins less freedom in designing their wikis. However, it would be easier just to leave it as it is.

And please, do not change the background size. Many wikis have custom backgrounds and this would mess those up, ruining hours of hardwork.

To put it in a nutshell, don't make these changes. Devote your attention to the bugs and other things that plague the wiki instead of driving seasoned users nuts. Wikia is fine jut like it is.