Hi Kate,
It was a completely new clean install of 6.7.3, nothing has been transferred to it yet. I have just deleted everything and installed again and I am still getting the same message once I log in and continue the install for the first time.
Browsing through other menus on the control panel, I have also noted the following meesage appearing, which may shed light on the problem further:
"!! Could not find var def for vars_display :: showcopytype"
Regards,
Phil