I can not reproduce the bug. When I selected a mail with 4 attachments, clicked on forward button and the mail opens in a new window with the original mail contents pasted into the new mail's contents. There is a frame within the mail window that shows me a list of 4 attachments found in the original mail which are also attached to the new mail. When I select one of them and delete, only that selected file gets deleted but not the mail. I could delete all of the 4 attachment files and still the mail content remained same.
I can not reproduce the bug. When I selected a mail with 4 attachments, clicked on forward button and the mail opens in a new window with the original mail contents pasted into the new mail's contents. There is a frame within the mail window that shows me a list of 4 attachments found in the original mail which are also attached to the new mail. When I select one of them and delete, only that selected file gets deleted but not the mail. I could delete all of the 4 attachment files and still the mail content remained same.