Greeny and
Ferret - no offence felt on my part! I did ask what happened and was quickly told precisely that!
Kingfisher and
GB - thanks for the info (I must confess that it didn't occur to me to google it - I'd assumed it would be here first!)
It seems to me often that quarrels arise when (what seem to me) light-hearted comments are taken seriously or as a personal affront. It's always going to be a problem when communicating purely by text with people you don't know IRL, as on forums. My rule is to always assume the best intentions.
(Also I've noticed that on the mobile site, all smilies show up as

which could lead to mis-interpretations...)