RSS feeds from Drupal websites are not handled by MediaSignage. Wordpress works fine. If you use the feed validation URL for RSS feeds: on the website: validator (not allowed to post exterrnal links, sorry)
All drupal websites (6 and 7) are working fine.
The first two lines of a Drupal RSS feed start like this:
<?xml version="1.0" encoding="utf-8"?>
<rss version="2.0" xml:base="your URL" xmlns:dc="URL //purl.org/dc/elements/1.1/">
The first line in the feed seems to be an issue with mediasignage.
According to me this is an issue because Drupal is a strong Content Management System and I've found nothing so far to remove the <?XML tag
All suggestions are welcome!