• Fix: Prevent database error when calling permission_order.register on app ready (Daniel Kirkham, Matt Westcott)
• Fix: Handle StreamField migrations where the field value is null (Joshua Munn)
• Fix: Prevent StreamChildrenToListBlockOperation from duplicating data across multiple StreamField instances (Joshua Munn)
• Fix: Prevent error on lazily loading StreamField blocks after the stream has been modified (Stefan Hammer)
• Fix: Prevent syntax error on MySQL search when query includes symbols (Matt Westcott)