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]]

Server runs Debian 5.0.8 but I don't have access to the Apache configs. Here's the tcp stream from wireshark without cookie data, page name is testiä.html. I guess page name is in utf-8 but in redirect after post it is given to browser with 8859-1.

	POST /ikiwiki.cgi HTTP/1.1
	Host: mcfrisk.kapsi.fi
	User-Agent: Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.9.1.16) Gecko/20110107 Iceweasel/3.5.16 (like Firefox/3.5.16)
	Accept: text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8
	Accept-Language: en-us,en;q=0.5
	Accept-Encoding: gzip,deflate
	Accept-Charset: ISO-8859-1,utf-8;q=0.7,*;q=0.7
	Keep-Alive: 300
	Connection: keep-alive
	Referer: http://mcfrisk.kapsi.fi/ikiwiki.cgi
	Cookie: XXXX
	Content-Type: multipart/form-data; boundary=---------------------------138059850619952014921977844406
	Content-Length: 1456

	-----------------------------138059850619952014921977844406
	Content-Disposition: form-data; name="_submitted"

	2
	-----------------------------138059850619952014921977844406
	Content-Disposition: form-data; name="do"

	edit
	-----------------------------138059850619952014921977844406
	Content-Disposition: form-data; name="sid"

	93c956725705aa0bbdff98e57efb28f4
	-----------------------------138059850619952014921977844406
	Content-Disposition: form-data; name="from"


	-----------------------------138059850619952014921977844406
	Content-Disposition: form-data; name="rcsinfo"

	5419fbf402e685643ca965d577dff3dafdd0fde9
	-----------------------------138059850619952014921977844406
	Content-Disposition: form-data; name="page"

	testi..
	-----------------------------138059850619952014921977844406
	Content-Disposition: form-data; name="type"

	mdwn
	-----------------------------138059850619952014921977844406
	Content-Disposition: form-data; name="editcontent"

	test
	-----------------------------138059850619952014921977844406
	Content-Disposition: form-data; name="editmessage"


	-----------------------------138059850619952014921977844406
	Content-Disposition: form-data; name="_submit"

	Save Page
	-----------------------------138059850619952014921977844406
	Content-Disposition: form-data; name="attachment"; filename=""
	Content-Type: application/octet-stream


	-----------------------------138059850619952014921977844406--
	HTTP/1.1 302 Found
	Date: Wed, 02 Feb 2011 19:45:49 GMT
	Server: Apache/2.2
	Location: /testi%E4.html?updated
	Content-Length: 0
	Keep-Alive: timeout=5, max=500
	Connection: Keep-Alive
	Content-Type: text/plain

	GET /testi%E4.html?updated HTTP/1.1
	Host: mcfrisk.kapsi.fi
	User-Agent: Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.9.1.16) Gecko/20110107 Iceweasel/3.5.16 (like Firefox/3.5.16)
	Accept: text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8
	Accept-Language: en-us,en;q=0.5
	Accept-Encoding: gzip,deflate
	Accept-Charset: ISO-8859-1,utf-8;q=0.7,*;q=0.7
	Keep-Alive: 300
	Connection: keep-alive
	Referer: http://mcfrisk.kapsi.fi/ikiwiki.cgi
	Cookie: XXXX

	HTTP/1.1 404 Not Found
	Date: Wed, 02 Feb 2011 19:45:55 GMT
	Server: Apache/2.2
	Content-Length: 279
	Keep-Alive: timeout=5, max=499
	Connection: Keep-Alive
	Content-Type: text/html; charset=iso-8859-1

	<!DOCTYPE HTML PUBLIC "-//IETF//DTD HTML 2.0//EN">
	<html><head>
	<title>404 Not Found</title>
	</head><body>
	<h1>Not Found</h1>
	<p>The requested URL /testi..html was not found on this server.</p>
	<hr>
	<address>Apache/2.2 Server at mcfrisk.kapsi.fi Port 80</address>
	</body></html>

Getting the pages has worked every time:

	GET /testi%C3%A4.html HTTP/1.1
	Host: mcfrisk.kapsi.fi
	User-Agent: Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.9.1.16) Gecko/20110107 Iceweasel/3.5.16 (like Firefox/3.5.16)
	Accept: text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8
	Accept-Language: en-us,en;q=0.5
	Accept-Encoding: gzip,deflate
	Accept-Charset: ISO-8859-1,utf-8;q=0.7,*;q=0.7
	Keep-Alive: 300
	Connection: keep-alive
	Cookie: XXXX
	If-Modified-Since: Wed, 02 Feb 2011 19:45:54 GMT
	If-None-Match: "1b518d-7c0-49b51e5a55c5f"
	Cache-Control: max-age=0

	HTTP/1.1 304 Not Modified
	Date: Wed, 02 Feb 2011 20:01:43 GMT
	Server: Apache/2.2
	Connection: Keep-Alive
	Keep-Alive: timeout=5, max=500
	ETag: "1b518d-7c0-49b51e5a55c5f"