Leo says it's normal for attachments to not go along for the ride when forwarding email. It's a security feature. Attachments are dangerous and even images can be infected. Leo understands it's a hassle to save the image out and then re-attach it. Leo also thinks that Earl may be in compact view, not standard which would prevent him from forwarding attachments. He can also check to make sure he's not forwarding just plain text, and he could try a different browser as well.
There's a setting in his webmail that would allow him to compose in RTF or HTML instead of plaintext. The chatroom suggests reading this tech note from GMail - http://support.google.com/mail/bin/answer.py?hl=en&answer=97577