After updating from 4.0.2 to 4.0.3 and recreating the sitemap, I got the following parsing error on all the generated XMLs.
XML Parsing Error: XML or text declaration not at start of entity
Location: (domain)/sitemap.xml
Line Number 2, Column 1:<?xml version="1.0" encoding="UTF-8"?><?xml-stylesheet type="text/xsl" href="(domain)/wp-content/plugins/google-sitemap-generator/sitemap.xsl"?><!-- generator="wordpress/3.8.2" -->
^I'm curious if it's due to being line 2, rather than line 1? But the code wasn't modified and I reattempted a reinstall of the plugin with the same results. I also updated to using PHP 5.4.26 around the same time, if that matters. Any ideas?
I attempted to resolve a backup copy of the version 4.0.2 for the plugin. This now has resulted in the error on those sitemaps:
XML Parsing Error: No element found
Location: (domain)/sitemap.xml
Line Number 1, Column 1:
^Quickly followed by:
Content Encoding Error
The page you are trying to view cannot be shown because it uses an invalid or unsupported form of compression.I am using GZip Compression, but it was working fine before.
I believe the update has messed with the '.htaccess' file?