If I save an attachment, which I routinely do via C-c C-s, and then later I delete it (with $ d on the button), instead of just deleting the attachment, I lose a large chunk (probably corresponding to the size of the external file) of the actual folder.
I must be the only one seeing this, otherwise there'd have been complaints - but I'm not aware of doing anything that would interfere with any of that code. Should I look harder, or is it possible there's an XEmacs interaction?
