Somehow my sitemap has been saved and is visible from your server:
http://www.microsystools.com/support/sitemaps/sitemap-def.xml
Could you delete it please?
Thanks for confirming.
Hereby deleted. Thought I had blocked my support folder in robots.txt
Guess not :( Will do that as well now :)
By the way, how did the image sitemaps additions work out? If you have more feature requests, let me know :)