Hello, yes sure Google is right
The XML sitemap must be well formed of course.
Normaly this kind of errors are due to some bugged plugins installed, at this FAQ there is a list of known plugins breaking the Joomla XML output:
http://storejextensions.org/faq/xml-sitemap-results-not-well-formatted.html
If you have none of these plugins installed, contact me directly at
This e-mail address is being protected from spam bots, you need JavaScript enabled to view it
providing an admin account so that i will be able to identify the problem.
Thanks!
John
