When you reject a Task you've been assigned you have to add a reason. This reason is saved as a Note in the Activity History of the Incident. An email it sent to the assigning user notifying him or her that the Task was rejected. But the email does not contain the reason why it was rejected. I would like this reason to be included into the notification.
1. Create a new field on Task.Assignment called RejectionReason (or whatever name you wish). Make this field big enough to meet your needs for a rejection reason.