Forward e-mail with inline images, inline images no longer attached
I have an e-mail from someone with a bunch of images attached as inline images.
They're displayed in the body of the e-mail, and also listed in the attachment "pane" at the top of the message window.
However when I click forward to forward the message to a new recipient, the inline images are removed from the body and they are no longer listed in the attachment "pane" at the top of the compose window.
I remember there were some bugs/discussions about inline images not being listed as attachments in the attachments "pane" in some earlier versions (6.0.5ish)
Is this a regression or a bug or the desired behaviour?
Or is it a one-off problem with this particular e-mail?