When visiting /admin/content/file I now see this error repeated 7 times:

Notice: Undefined index: 27 in file_entity_admin_files() (line 367 of /home/someuser/public_html/someproject/sites/all/modules/contrib/file_entity/file_entity.admin.inc).

Pretty sure this has only started appearing since updating to 7.x-2.0-alpha3+1-dev.