The first line of the post-sitemap.xml file generated by WordPress SEO by Yoast is:
# 100% 0 Daily 2012-03-12 00:58
... with no url, just the "#" sign. Google is reporting a "Invalid URL" error for that file, and asking for it to be corrected.
What would cause that line to be generated, and how can I fix it?
Thanks for any help.