Google seems to have changed their URLs where pings to the sitemap webmaster helper tool are sent to.
Thus, the Serendipity Google Sitemap plugin requires you to either manually update to the right URL. The updated plugin in Spartacus has been committed today and should be available tomorrow.
The new URL to use is: http://www.google.com/webmasters/tools/ping?sitemap=%s (see this thread)
- Keine Trackbacks