[Mediawiki-l] How to display category counts for pages and subcategories

[Gregor Hagedorn]

On commons, e.g.
http://commons.wikimedia.org/wiki/Category:Lacerta_%28genus%29  the
number of subcategories, pages, and files in subcategories is directly
displayed. On our default installation, only subcategories are
directly displayed, the other information appears only in the tooltip.

I cannot find an appropriate setting on mediawiki.org. Any hints or ideas?

thanks!

Gregor