I use Opera for my RSS reader. When attempting to subscribe to a feed I get the following error;
XML parsing failed: syntax error(Line:2, Character:0)
Reparse document as HTML
Error: XML declaration not at beginning of document
2:<?xml version="1.0" encoding="UTF-8"?>
4:<rss xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema" version="2.0">
Hope you find this helpful, I've used opera on a variety of sites with no problems so I'd assume there is an issue with your implementation?
Thank you for your efforts to improve and maintain the site. Much Appreciated!