Feed suddenly not updating and getting resync errors

[Eric Mohl]

The feed on my WP blog is suddenly not working - it will not update and show my most recent post. (http://trans-americas.com/blog) and I have tried everything I can think of. I have not made any updates to the blog since it was last working at the end of last week,

- My source feed http://trans-americas.com/blog/feed/ shows the most recent post ("Sloths in the City") but my feedburner feed does not http://feeds.feedburner.com/Trans-AmericasJourney.

- Both my original feed validity http://feedvalidator.org/check.cgi?url=http%3A%2F%2Ftrans-Americas.com%2Fblog%2Ffeed%2F, and my feedburner feed validity http://feedvalidator.org/check.cgi?url=http%3a%2f%2ffeeds.feedburner.com%2fTrans-AmericasJourney appear to be fine. However, the original shows the most recent post but the feedburner does not.

- When I ping my original feed I receive the following error

Your Ping resulted in an Error "We were unable to process your ping. You must ping with a URL that exactly matches the channel link (RSS) or alternate link (Atom) in your top level feed element pointing back to your website (e.g http://myblog.blogspot.com/), or use your feed URL (e.g. http://feeds.feedburner.com/myuri)."

- When I ping my feedberner feed I receive a message that it was successful, however it does not update the new post.

- When I resync the feed I receive the following message:

"There is an issue that must be addressed with your source feed for the feed "Trans-Americas Journey Blog"

- I have deactivated all plugins and that does not solve the issue.

- The feed is not to long. To be sure, I reduced the feeds to display form 8 posts down to 1 and nothing changed.

Any ideas as to what can be causing this.
Thanks

[Wayne Wirs]

I've been having the exact same problem. Same tests you've done, same results. Mine hasn't worked since my 5/17/2013 post. My feedburner feed is two posts behind.

[Eric Mohl]

Though not yet resolved for me this seems to be an error with my host, Media Temple. There is further discussion here https://groups.google.com/forum/?fromgroups=#!topic/feeds-and-syndication/B-mXUrRG5TQ

[Lorenzo Pascucci]

i discovered a WEIRD thing, maybe this can help other, i had some ips blocked in htaccess with "xxx" like 111.111.xxx.xxx, i had to remove all those entries, even if it was not feedburner ips, after this and after removing comment lines like this:

Deny from 111.111.111.111 #my comments

I had to remove all the #anything from my htaccess, after this, feed was working again, WEIRD......