Installed on Zen Cart v1. 37.
When entering the checkout, i. e.  switching to SSL, the above warning displays.  It is due to the status icons.
I saw the following thread in another forum:
hxxp: forums. oscommerce. com/lofiversion/index. php?t99093. html
but could not understand which files to edit, and it also looks rather dated.

Any ideas. . . ?

www. surveyequipment. com

Sorted. . .

hxxp: www. helpcenterlive. com/smf/installation_help_software_support/using_ssl-t200. 0. html