I have been told by a number of people that they are having problems with my RSS and email feeds
I apologise. This originates in an old Feedburner problem which meant that this blog ended up with two feed addresses. The old one began to malfunction in late January and seemed to die on February 1st. This had address http://feeds.feedburner.com/org/hnQR. If you were connected to this I am afraid it does no longer work.
http://feeds.feedburner.com/org/lWWh does work though (and lots of people are using it).
If you can change to the new one this may will solve the problem for RSS purposes, but I admit that for those taking email I have not yet got a solution form Feedburner bar re-registering for RSS (which I recommend anyway) or using an alternative email address.
When I know more I will give more information.