Dear John,
Yes the latest version, but to be sure redid it. Same problem and no reported JS errors have tried in Safari & FireFox.
BUT on it's own it works so it's a conflict with one of these:
'markasjunk2', 'help', 'new_user_dialog', 'importmessages', 'managesieve', 'compose_newwindow', 'copymessage', 'emoticons', 'sauserprefs'
any ideas?
thank you....... liz