I upgraded to WordPress 2.5 yesterday and when I looked at the Google Webmaster Tools I found that the RSS feed being used as a sitemap was now generating errors with Google. Below are the errors I receive from Google Webmaster Tools:
URL of Sitemap: http://www.jaydrake.net/?feed=rss2
Invalid URL
This is not a valid URL. Please correct it and resubmit.
Parent tag: channel
Tag: link
Found: Apr 11, 2008
Invalid XML: too many tags
Too many tags describing this tag. Please fix it and resubmit.
Parent tag: channel
Tag: link
Found: Apr 11, 2008
Incorrect namespace
Your Sitemap or Sitemap index file doesn't properly declare the namespace.
Parent tag: channel
Tag: link
Found: Apr 11, 2008