FRM: NPE thrown in notification

During OF1.3 CSIT:

2014-08-14 22:40:25.049 CEST [FlowCapableTopologyExporter-flow:1] ERROR o.o.c.l.b.i.UncaughtExceptionPolicy - Thread Thread[FlowCapableTopologyExporter-flow:1,5,main] died because of an uncaught exception
java.lang.NullPointerException: null
at org.opendaylight.md.controller.topology.manager.FlowCapableTopologyExporter.removeAffectedLinks(FlowCapableTopologyExporter.java:181) ~[na:na]
at org.opendaylight.md.controller.topology.manager.FlowCapableTopologyExporter.access$400(FlowCapableTopologyExporter.java:47) ~[na:na]
at org.opendaylight.md.controller.topology.manager.FlowCapableTopologyExporter$4.applyOperation(FlowCapableTopologyExporter.java:114) ~[na:na]
at org.opendaylight.md.controller.topology.manager.OperationProcessor.run(OperationProcessor.java:55) ~[na:na]
at java.lang.Thread.run(Thread.java:745) ~[na:1.7.0_65]

This could be a datastore/codec problem, but needs to be analyzed by someone who understands the app.