RSS Validator

Your feed appears to be encoded as “this”, but your server is reporting “that”

The XML appears to be using one encoding, but the HTTP headers from the web server indicate a different charset. Internet standards require that the web server's version takes preference, but many aggregators ignore this. Note that, if you are serving content as 'text/*', then the default charset is US-ASCII, which is probably not what you want. (See RFC 3023 for technical details.)

RSS feeds should be served as application/rss+xml (RSS 1.0 is an RDF format, so it may be served as application/rdf+xml instead). Atom feeds should use application/atom+xml. Alternatively, for compatibility with widely-deployed web browsers, any of these feeds can use one of the more general XML types - preferably application/xml.

Another possible cause is the use of single quotes to delimit the charset parameter in the http header, whereas the http definition of Basic Rules only permits the use of double quotes. The result is somewhat confusing messages such as:

Your feed appears to be encoded as “utf-8”, but your server is reporting “'utf-8'”

Either ensure that the charset parameter of the HTTP Content-Type header matches the encoding declaration, or ensure that the server makes no claims about the encoding. Serving the feed as application/xml means that the encoding will be taken from the file's declaration.

The W3C has published information on how to set the HTTP charset parameter with various popular web servers.

If you are unable to control your server's charset declaration, Character and Entity References may be used to specify the full range of Unicode characters in an feed served as US-ASCII.

You might be able to find help in one of these fine resources.