I've been away again and came back to find that while I was away, the e-mail account associated with this blog was hacked: somebody managed to get access to the address book and was spamming addressees. As far as I know, it hadn't yet got beyond little blue pills, but my apologies if you were on the receiving end.
That e-mail address has been closed down and has been replaced by another. If you received anything and haven't received an apology from the new address, please let me know in the combox, but don't include your e-mail address as I should already have it.
Normal service will hopefully be resumed very shortly.