The "PhD Comics" ( feed is not working correctly

New entries are correctly reported in the side bat but the last entry displayed in the content pane is always the same. I believe there is an error in the feed parsing.


Looking at it:

The Newsblur website says it’s fetching stories every hour, but hasn’t picked up an update since the 27th June. But the Newsblur Android App does show the older posts.

The RSS looked like if should have parsed fine to me.

It’s started working for me now.

The feed is still not behaving correctly. There is something I can do to help diagnose the bug?