This behavior is what is expected. In dragging the attachment all you
are doing is moving a link to where the attachment is. This happens
cross-platform. Thusly, this is invalidated. This
http://productforums.google.com/forum/#!forum/gmail would be the
appropriate place for further discussion.
Hold on a sec... This function has worked for more than a year and has
only recently stopped working.
I understand that when dragging and dropping an image the result is a
link. And I also realize that this is quite possibly an application
related problem.
I've tested this drag and drop to save
