Some of you experienced the issue, that Google Webmaster Tools showed all pages of the sitemap as "submitted", but none of them as "indexed".
I've talked to Google about this behavior, and they confirmed it was a issue with the presentation in Google Webmaster Tools. It was resolved Friday night and should already be fixed in all of your sites now or later today. It was just a presentation issue, the actual index of your blog was NOT disturbed in any way.
If you still don't see any indexed pages, please check:
- That you have verified the right website. As explained in this blog article, Google differentiates now (since end of march!) between http / https, www / non-www and root / subfolder. So if you run your blog on http://www.blog.com/ make sure you add http://www.blog.com/ to Google Webmaster Tools and http://www.blog.com/sitemap.xml as your sitemap. If you add http://blog.com/ or https://www.blog.com/ you will NOT see indexed pages!
- That your sitemap does not have any errors. Your sitemap might contain warnings, for example when your website was loading slowly when Google tried to crawl it. This is not an issue with your sitemap
- If your sitemap contains links to pages which are not available, try to find them in WordPress and check which plugins you have installed. The plugin reads all posts from the post table which are published and don't have a password. If something appears in your sitemap, it is in your WordPress database.