Security improvements
Tightened access to private content and uploaded files based on capabilities.
Improved file attachments
Files used as private attachments can no longer be re-assigned after submitting.
WPML compatibility
Fixed mixed queries for HivePress and regular comments within the same page.
Improved draft handling
Unsaved drafts used for file uploads are now managed automatically.
Developer helpers
New helpers for extension developers to manage drafts and move attachments.