My feed blew up the other day for no reason I can discern. I rebooted it at Feedburner, and it now works fine there, but my readership is still down by almost 60 percent. Bloglines tells me the feed is still no good.
I went to the feed validation site at http://validator.w3.org and it said the feed was invalid:
Sorry
This feed does not validate.
* line 66, column 2: Undefined entry element: thr:total (5 occurrences) [help]
<thr:total>0</thr:total>
What is that "thr" call and where is it coming from? I disabled all my plugins and I still get it. I haven't touched my theme in months and the last time I checked the feed about six weeks ago, this "thr" error was not there.
Anyone have any idea what is causing this "thr" error?