When W3 Total Cache is enabled my RSS feed cannot be validated.
The feed is normally supposed to send 'content-type': 'application/rss+xml; charset=UTF-8'
And it does so ( After doing a little change in the feed-rss2.php file )
But when the feed is cached it will be sent with a 'content-type': 'text/html'
Which in most cases works fine, but some newsreaders might not work as expected. And the W3 RSS validator throws a warning.
Is there any way to make RSS feeds valid while still using the plugin?