I had to specify the encoding in my blog feed, since my stories are not written in UTF8 and Content-type specified charset=ISO-8859-1

$ diff -u /pub/web/blosxom/cgi-bin/blosxom.cgi{~,}
--- /pub/web/blosxom/cgi-bin/blosxom.cgi~       2007-09-01 01:53:56.000000000 +0200
+++ /pub/web/blosxom/cgi-bin/blosxom.cgi        2008-03-03 23:23:42.000000000 +0100
@@ -442,7 +442,7 @@
 html date <h3>$dw, $da $mo $yr</h3>\n
 html foot <p /><center><a href="http://www.blosxom.com/"><img src="http://www.blosxom.com/images/pb_blosxom.gif" border="0" /></a></body></html>
 rss content_type text/xml
-rss head <?xml version="1.0"?>\n<!-- name="generator" content="blosxom/$version" -->\n<!DOCTYPE rss PUBLIC "-//Netscape Communications//DTD RSS 0.91//EN" "http://my.netscape.com/publish/formats/rss-0.91.dtd">\n\n<rss version="0.91">\n  <channel>\n    <title>$blog_title $path_info_da $path_info_mo $path_info_yr</title>\n    <link>$url</link>\n    <description>$blog_description</description>\n    <language>$blog_language</language>\n
+rss head <?xml version="1.0" encoding="iso-8859-15"?>\n<!-- name="generator" content="blosxom/$version" -->\n<!DOCTYPE rss PUBLIC "-//Netscape Communications//DTD RSS 0.91//EN" "http://my.netscape.com/publish/formats/rss-0.91.dtd">\n\n<rss version="0.91">\n  <channel>\n    <title>$blog_title $path_info_da $path_info_mo $path_info_yr</title>\n    <link>$url</link>\n    <description>$blog_description</description>\n    <language>$blog_language</language>\n
 rss story   <item>\n    <title>$title</title>\n    <link>$url/$yr/$mo_num/$da#$fn</link>\n    <description>$body</description>\n  </item>\n
 rss date \n
 rss foot   </channel>\n</rss>