I would like to request an enhancement for Dropbox. Currently if a student hits submit on a Dropbox assignment without uploading the attachment, the teacher has to go in and fix this so the student can resubmit. To alert students that they are just submitting text, it would be great to get an error/warning message that pops up anytime a Dropbox assignment is submitted without an attachment. This would be along the lines of: "You have not attached a file. Submit anyway? Yes/No" so that if the student clicks yes without the attachment, they were warned first.