Thanks to a heads up from Pope I’ve fixed comment entry. I’d change themes and forgot to put in a box for the math comment spam protection thingy, which would explain why there have been no comments for two months!
I’ve also switched back to my old WordPress theme. I’ve not been very keen on any of the minimalist ones I’ve been using, but I’m not so happy with this one any more since it’s a bit long in the tooth. So I’ve either got to find another one I really like or make one meself. Doh!