Exeterdad, I'm not sure about printers configured with the old cups, because I deleted the printer before upgrading...
But I think I lost the xfce "connection" after upgrading cups.
Meaning, if I open Printing System Settings, CUPS is not there as an option.
I think as a consequence the Print Manager doesn't show a printer, even though one is properly installed through the web interface.
I'm not sure this is the case, but since it happened after upgrading, I suspect that was the cause.
Can anyone confirm?