Small problem here : I've inadvertently deleted the page yesterday.
From memory :
- Watches and lang
- Rss and lang
- search and Next result (if we display only N result per N result)
- recent changes and Next result (if we display only N result per N result)
- what links here and Next result (if we display only N result per N result)
- make sure only master nodes get an entry in content_hierarchy table
- display wikirenderer error if any