AdminP Rename Web User error: "Waiting for new name fields ..."

After issuing a Rename Web User request the AdminP task reports an error for some users:

07/07/2005 12:00:00 Waiting for new name fields in 's person document

07/07/2005 12:00:00 Admin Process: Received the following error performing a Rename Web User in Domino Directory request on . Waiting for new name fields in 's person document. Will try to process the request again at 07/07/2005 12:00:00

These users appear to have been renamed correctly. It only happens for some users and I cannot spot anything different about their Person docs.

Has anyone seen this before ???

TIA,

Mark.