SAX Exception (553) on a feed that validates on w3c's validator

problem
#1

http://www.zdziarski.com/blog/?feed=rss2 looks fine, and  validates at https://validator.w3.org/feed/check.cgi?url=http%3A%2F%2Fwww.zdziarski.com%2Fblog%2F%3Ffeed%3Drss2

What’s up with that?

3 Likes
#2

Still happening . . .

#3

I had trouble with that blog before and suspected the CloudFlare protection was causing the problem. I created a FeedBurner feed and use that to follow the site:
https://feeds.feedburner.com/ZdziarskisBlogOfThings