At least my setup on kapsi.fi always prints 404 Not Found after adding a page with non-ascii characters in name. But the page exists and is visible after the 404 with url encoding and the blog page is inlined correctly on the feed page.

Apparently ikiwiki.info does not complain with 404. Should the character encoding be set in wiki config?

Happens also after editing the page. Here's an example:

 * page name displayed in 404: http://mcfrisk.kapsi.fi/skiing/posts/Iso-Sy%F6te%20Freeride%202011%20Teaser.html?updated
 * page name in the blog feed: http://mcfrisk.kapsi.fi/skiing/posts/Iso-Sy%C3%B6te%20Freeride%202011%20Teaser.html

Difference is in the word Iso-Syöte. Pehaps also the browsers is part of
the game, I use Iceweasel from Debian unstable with default settings.

> I remember seeing this problem twice before, and both times it was caused
> by a bug in the *web server* configuration. I think at least one case it was
> due to an apache rewrite rule that did a redirect and mangled the correct
> encoding.
> 
> I recommend you check there. If you cannot find the problem with your web
> server, I recommend you get a http protocol dump while saving the page,
> and post it here for analysis. You could use tcpdump, or one of the
> browser plugins that allows examining the http protocol. --[[Joey]]