i think there is something broken for related items field of the ATLink object.
In fact, despite the field is populated, the method getRelatedItems return always an empty array (trying with a full Object not a Brain).
This seem to happen only on Plone 4.3.7.
I'm using this configurations:
Plone 4.3.7 (4311) CMF 2.2.9 Zope 2.13.23 Python 2.7.9 (default, Mar 1 2015, 12:57:24) [GCC 4.9.2] PIL 2.9.0 (Pillow)