jlcoleman71 on "[Plugin: WordPress SEO by Yoast] XML sitemap error with latest version 1.4.13"

I updated to the latest version of WP as well as the Wordpress SEO plugin and I'm now getting the following error message when I click the "XML Sitemap" button to view the sitemap directory:

Error loading stylesheet: An XSLT stylesheet does not have an XML mimetype:

Any ideas????

Thanks

http://wordpress.org/extend/plugins/wordpress-seo/