Digest sends code but not content

Here is what I got sent for my content type organisation. WHay is this?

New content of type Organisation has
been submitted - [UNDEFINED type = event, method = mail, key =
notifications-event-node-insert] - [UNDEFINED type = event, method = mail,
key = notifications-event-node-insert] - [UNDEFINED type = event, method =
mail, key = notifications-event-node-insert] - [UNDEFINED type = event,
method = mail, key = notifications-event-node-insert] - [UNDEFINED type =
event, method = mail, key = notifications-event-node-insert] - [UNDEFINED
type = event, method = mail, key = notifications-event-node-insert] -
[UNDEFINED type = event, method = mail, key =
notifications-event-node-insert] - [UNDEFINED type = event, method = mail,
key = notifications-event-node-insert] - [UNDEFINED type = event, method =
mail, key = notifications-event-node-insert] - [UNDEFINED type = event,
method = mail, key = notifications-event-node-insert] - [UNDEFINED type =
event, method = mail, key = notifications-event-node-insert] --