I found out why my “Read More” drop-down posts stopped working. It had to do with the fact that the critical bit of javascript was hosted off site. This caused bandwidth problems for that provider, Ramani, at Hackosphere, who stopped offering the service.
However, Ramani was kind enough to allow his javascript to be posted inside other people’s Blogger templates – so after a quick copy and paste I’m back where I’m supposed to be.
And now it is even more obvious to me that my blog is big enough to need a real site and some professional set-up and maintenance. Once things in my life settle I’ll get onto that.