On Wed, 2011-03-16 at 14:51 -0700, Daniel L. Miller wrote:

I've got an attachment that triggers a "smaller than expected" error.
It was a pdf I received some time ago. I copied the file from the dovecot storage, renamed it to something close to the original name (I don't remember what that was), then created a new mail with this as an attachment and saved it to the server. This created a new file, identical file size to the other - but continues to have the "smaller than expected" error.

You mean you can reproduce the "smaller than expected" for newly delivered mails with a specific attachment? Any chance you could send such a mail to me?