I have a distribution list created when using Outlook 2003. Upgraded to
2007. The dist list successfully moved across. When I try to send to
that distribution list, Outlook 2007 reports "unexpected error" and
failes to send. I can send the same email to the distribution list when
I manually enter each person's email address into the "TO" field.

I presume this a "bug". Frankly surprised such a bug still exists. Am
I doing something wrong?