All reports of unknown-template-type for the archive. The extended description of this tag is:

A "Type:" field in a templates file provided by this package uses an unknown data type. Valid types are currently "string", "boolean", "select", "multiselect", "note", "text", and "password".

Severity: important, Certainty: certain

Check: debconf, Type: binary, udeb, source

This tag has not been emitted in any package tested by Lintian.