I probably shouldn't do this when I've just pressed the button to ask for my blog to be reviewed for spam, but I couldn't resist...
I got back from my weekend away to discover that I can't post on my blog without word verification. On pressing the help button, I find that this is because "Blogger's spam-prevention robots have detected that your blog has characteristics of a spam blog".
Apparently spam blogs "can be recognized by their irrelevant, repetitive, or nonsensical text, along with a large number of links, usually all pointing to a single site". Well, I don't have that many links, and they're all to different sites.
I suppose that must mean that the robot has decided my vague musings are irrelevant, repetitive or nonsensical.