263822fd19
Hi,
It seems to be a regression since the commit 53a5a48aed
Doctrine\ORM\PersistentCollection can be populated in $changeSet if you set a PreUpdate and PostUpdate event.
Original issue: http://www.doctrine-project.org/jira/browse/DDC-3033
Doctrine 2 ORM
Master: 
2.4: 
2.3: 
2.2: 
2.1: 
Master: 
Doctrine 2 is an object-relational mapper (ORM) for PHP 5.3.2+ that provides transparent persistence for PHP objects. It sits on top of a powerful database abstraction layer (DBAL). One of its key features is the option to write database queries in a proprietary object oriented SQL dialect called Doctrine Query Language (DQL), inspired by Hibernates HQL. This provides developers with a powerful alternative to SQL that maintains flexibility without requiring unnecessary code duplication.