1 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.
3 Apparently ikiwiki.info does not complain with 404. Should the character encoding be set in wiki config?
5 Happens also after editing the page. Here's an example:
7 * page name displayed in 404: http://mcfrisk.kapsi.fi/skiing/posts/Iso-Sy%F6te%20Freeride%202011%20Teaser.html?updated
8 * page name in the blog feed: http://mcfrisk.kapsi.fi/skiing/posts/Iso-Sy%C3%B6te%20Freeride%202011%20Teaser.html
10 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.