Am I the only one who gets an XML parsing error (using Firefox 3.6.3)? Page specifies content-type "application/xhtml+xml", might even be valid XHTML, but cont

Am I the only one who gets an XML parsing error (using Firefox 3.6.3)? Page specifies content-type "application/xhtml+xml", might even be valid XHTML, but contains some spurious characters (1e773) at the beginning.