I made a mistake in the initial setup of my Fargo to S3 system. I was using the default settings which meant all disqus comments were using a group name not belonging to me.
I've changed this
Unfortunately any existing comments got nuked in the process :-(
And so it goes...
[Update]
The deeper I delve into Fargo, the better it gets. I can totally bring back the original comments for selected posts.
This is some groovy shit.