submitting my feed address http://podictionary.com/?feed=rss2 to validation services http://www.feedvalidator.org and validator.w3.org both confirm the feed as valid but feedvalidator recommends:
interoperability with the widest range of feed readers could be improved by implementing the following recommendations.
*line 3, column 0: Unknown namespace:http://participatoryculture.org/RSSModules/dtv/1.0
<rss version="2.0"
*line 22, column 38: Email address is missing real name
<webMaster>me@mydomain.net</webMaster>
*line 950, column 1: Missing atom:link with rel="self"
</channel>
I believe these lines to be generated by wordpress and I don't know where I would be able to change them (or what to change them to). Further validator.w3.org warns:
No DOCTYPE found! Checking XML syntax only.
The DOCTYPE Declaration was not recognized or is missing. This probably means that the Formal Public Identifier contains a spelling error, or that the Declaration is not using correct syntax, or that your XML document is not using a DOCTYPE Declaration.
Any hints appreciated, thanks