To Replicate the issue:
1. Login as instructor.
2. Create an assignment with Student Submissions: Attachments only and, post it.
3. login as student click on the assignment.
4. Add an attachment by clicking on "Choose file".
5. The file is not attached and a message is displayed on the top of page saying "student doesn't have permission to add resources".
Note: Looks good in QA01 and trunk. However, it is not working in Rc02