01223: Extra newline in the output cause problems
<?xml version="1.0" encoding="UTF-8"?>
Sometime cause problems with some strict XML parser, such as google sitemap (it will fall) , and got "XML Parsing Error: XML or text declaration not at start of entity".
Make sure your local and cookbook PHP files do not have the closing
?> tag, see the faq section at DesignNotes. Otherwise, check if your skin templates don't have new lines at the beginning. --Petko September 14, 2010, at 06:06 AM