Oooh, I’ve just disabled the “remove media” setting, and now it’s not mangling the A HREF anymore.
It looks like it’s somehow getting confused with that specific A HREF permutation. Perhaps a bug?
Correction — It has simply remvoed the whole of:
on the SCN" href="http://en.wikipedia.org/wiki/Suprachiasmatic_nucleus" !!
Help still very much appreciated. 🙂