For some reason, this error just appeared on the day we re-launched our site!
I've searched this support forum, tried using the "fix-rss-feed" plugin, manually searched for blank spaces at the end of each of my theme's .php files. I have no idea what's causing it.
XML Parsing Error: XML or text declaration not at start of entity
Location: http://takezer0.com/feed/
Line Number 5, Column 1:<?xml version="1.0" encoding="UTF-8"?>
^