I've created a printer with iManager, and it went as expected.
No issues, error messages, or anything else that looked like a
problem. However, when I try to manage the printer with
iManager, I get an error which states:

Attribute could not be found: Printer Agent Name

The printer agent has been created, I can see it in the manager.
I've run dsrepair on all of the eDirectory replicas until it
returns no errors. I can ping the printer.

What else can I check?