Yes, when the Reading Settings are set to “full text” you get the error above. When it is set to “Summary” you do not get the error and the feed validates.
It took me a full day to figure out what was causing this problem, so I deactivated all plugins and re-activated one-by-one and External Links was the one causing the problem.
If “Apply Globally” is un-checked, the feed validates. When checked, it does not validate.
Looks like that worked! Thanks so much!
Thanks, but it’s still not pulling the linked URL of the image just still linking to the homepage.