Where the Zip/Postcode should be shown, I get the telephone number shown again.
It’s set correctly in the database… cscart_user_profiles.s_zipcode is a real postcode
It’s just a display problem, but I cannot for the life of me work out where to fix it 
( I also see the problem on the Order info screen, so I guess it’s not a simple invoice template issue )
EDIT: I’ll raise a support issue for this one.
EDIT 2 : I think this is only when the shipping address is different from the billing.