1. Deposit an item as a non-admin user (e.g. the Demo Submitter on demo.dspace.org)
2. On the "Access" page, select the "Make Private" checkbox
3. On completion of the submission you will receive an "AuthorizeException":
org.dspace.authorize.AuthorizeException: To withdraw item must be COLLECTION_ADMIN or have REMOVE authorization on owning Collection
The problem is that a non-Admin user cannot withdrawn an item, but all "private" items are currently being withdrawn.