I'd probably mark this as duplicate of bug 10628, but this speaks about extension.

eep wrote:

With the help of another user, [[mw:User:Tim Laqua|]], this now works in the main search script. See [[mw:Talk:Extension:Multi-select Namespace Search]] for discussion about how to replace/overwrite/override stock functions within classes. Any ideas?

eep wrote:

Not sure why the link to "mw:" (MediaWiki) goes to Wikipedia but the above link should be http://www.mediawiki.org/wiki/Extension_talk:Multi-select_Namespace_Search (and I'm updating the extension with the CSS element fix from bug 10628.

robchur wrote:

(In reply to comment #3)

Not sure why the link to "mw:" (MediaWiki) goes to Wikipedia

Our hacks to BugZilla don't include a full-blown interwiki link parser; MediaWiki's smart enough to handle interwiki redirects for us. The link should still work. :)

eep wrote:

It ''does't'' work though; try it and see...

eep wrote:

Neither does MediaWiki italics markup too, apparently...