Hi and thank you to all the admins for looking into it.
Yes - I do get anti-span questions about 25% of the time (just "retype this number" thingies). The time-out thing can be very annoying if you've typed a big reply, because as soon as you're timed out, you know there's no way to get it back. The BACK button doesn't restore it. I suppose it's my own fault for spending too long on a single response, or not typing it in Word and then pasting (but then formatting becomes more of a nuisance). Simple answer is to do a COPY beforehand, but you have to remember to do it before you hit SUBMIT.
Anyway ... the fact that I've written all this will probably help me to remember! Thanks once again for checking.