Now if I only could edit this thread as one _normally_ can do in forums..... an drename thread headline to "SiteMap not outputting valid XHTML" :)

To put it simply; Make sure all outputted code by EPiServer is valid XML. E.g. the WYSIWYG editor does _not_ output valid XML (I believe it is a 3rd party component and may be changed).

We are having this problem as well, Episerver should render xhtml that passes validation.

If you are using versions prior to 5 the templates supplied with the EPiServer installation is ONLY examples and needs to be changed in order to create a site that validates. There has been some words around the forum that with the 5 version some templates shall be considered production so hopfully they will validate. Then if EPiServer.WebControls.PageTree is used it is not designed in a way that will make it easy to create valid ul/li html. In my opinion it's easiest to create a new webcontrol based on EPiServer.WebControls.PageTreeData and make a proper templates so that proper ul/li rendering can be made over and over again. Regards HAXEN