Rss feed not validating
As we scrolled down the list of troubleshooting options, there was the option to Resync your feed.
On the troubleshootize page if you scroll down to the bottom, you will find a button labeled “Resync Now”.
In the left column you will now see a button for “Pingshot”. This will cause your feed to ping every time there is an update.
This will bring you to a page where you can type in your blog’s URL. Again in forums, folks suggested that this worked for them.
Press the “Ping Feedburner” button to update your feed immediately rather than waiting on Feedburner’s automatic update that happens every 30 minutes. But as you can see with our reaction, it did not work for us.
After doing a bit more research, we found that this issue was being caused by caching plugin.
We did a quick research and found several users having this issue while using W3 Total Cache.