XML-Declaration commented

Hi everybody,

loading an xhtml fragment with the xml declaration:

<?xml version="1.0" encoding="UTF-8" ?>

This is some <strong>sample text</strong>. You are using <a href=\"http://www.fredck.com/fckeditor/\">FCKeditor</a>

is transformed by the FCKeditor to
<!--l version="1.0" encoding="UTF-8"-->
This is some <strong>sample text</strong>. You are using <a href=\"http://www.fredck.com/fckeditor/\">FCKeditor</a>

Now my question is: How to prevent this or where in the sourcecode
this transformation is applied so I can override that behaviour?
I need the xml declaration being preserved!

Thanks a lot for any hints,

Andreas.