We recently found that attempts to email a list of users or contacts (pretty much any list) using an email template did not work. When attempting to send an email to a list we would get the following error:
"The requested record was not found or you do not have sufficient permissions to view it."
We brought this up with Microsoft and it ended up in being a bug and Microsoft has just released a bug fix for this issue. You must submit a ticket with Microsoft for the hotfix but there will be no charge for the ticket. The KB article is 951477.
The list of bug fixes is growing and I think that's a big help to CRM 4.0.
Hopefully this helps someone else out there.
Dynamic Methods Inc.