Original request says the Last-Modified
date is Mon, 11 Nov 2013 14:16:00 GMT
which is in the future so it is probably misconfigured.
curl -v http://www.pvponline.com/feed
* About to connect() to www.pvponline.com port 80 (#0)
* Trying 54.245.239.139...
* connected
* Connected to www.pvponline.com (54.245.239.139) port 80 (#0)
> GET /feed HTTP/1.1
> User-Agent: curl/7.24.0 (x86_64-apple-darwin12.0) libcurl/7.24.0 OpenSSL/0.9.8x zlib/1.2.5