I've recently generated a sitemap, but Google has it flagged as invalid.
Invalid tag value
This XML tag has an invalid value. Please fix it and resubmit.
Parent tag: url
Problem detected on: Mar 11, 2010
Sitemap URL: [external links are visible to admins only]
Line 20 reads: <priority>o.8</priority>
I have no idea what is wrong with it. Any value up to 1.0 should be proper, right? It certainly had no trouble with a <priority>0.85</priority> not far above. What's wrong?