Hello RavanH. There is some problem on WP3.1 between xml-site map and Dagon Design Sitemap Generator v3.15 when DDSG is set to czech language. If than I try to access sitemap.xml, it outputs without css and more over it shows error that header already sent.
Warning: Cannot modify header information - headers already sent by (output started at /data/web/virtuals/4600/virtual/www/domains/pokorni.cz/wp-content/plugins/sitemap-generator/lang/Czech.php:100) in /data/web/virtuals/4600/virtual/www/domains/pokorni.cz/wp-content/plugins/xml-sitemap-feed/feed-sitemap.php on line 9
Could you do some cooperation with author of DDSG to solve it?
V.