Hello, after upgrading to NextGEN Gallery v2.0.27, it seems to have a conflict with Yoast's WordPress SEO v1.4.18. The problem is that the XML sitemap which is generated by WordPress SEO becomes unreachable.
The link to my XML Sitemap is http://www.die-screaming.com/sitemap_index.xml
I deactivated all plugins and then reactivated them 1 by 1. This resulted in my discovering that it was NextGEN Gallery causing the conflict. Both WordPress SEO and NextGEN have had recent updates, so I'm not sure what all happened to make it break. The two were playing nice...but now they're not.
I see that a thread also opened on the WordPress SEO forum, also reporting the same problem:
Any help you can provide would be much appreciated. In the meantime, I have disabled NextGEN.