Errors when starting OVSDB with NXM extensions

The following errors are seen in the logs...

2014-09-05 19:42:41.478 BST [config-pusher] WARN o.o.o.p.i.d.DeserializerRegistryImpl - Deserializer for key msgVersion: 4 objectClass: org.opendaylight.yang.gen.v1.urn.opendaylight.openflow.oxm.rev130731.oxm.fields.grouping.MatchEntries msgType: 1 oxm_field: 32 experimenterID: null overwritten. Old deserializer: org.opendaylight.openflowjava.protocol.impl.deserialization.match.NxmTunnelIpv4DstDeserializer, new deserializer: org.opendaylight.openflowjava.nx.codec.match.TunIpv4DstCodec
2014-09-05 19:42:41.478 BST [config-pusher] WARN o.o.o.p.i.d.DeserializerRegistryImpl - Deserializer for key msgVersion: 4 objectClass: org.opendaylight.yang.gen.v1.urn.opendaylight.openflow.oxm.rev130731.oxm.fields.grouping.MatchEntries msgType: 1 oxm_field: 32 experimenterID: null overwritten. Old deserializer: org.opendaylight.openflowjava.protocol.impl.deserialization.match.NxmTunnelIpv4DstDeserializer, new deserializer: org.opendaylight.openflowjava.nx.codec.match.TunIpv4DstCodec
2014-09-05 19:42:41.478 BST [config-pusher] WARN o.o.o.p.i.d.DeserializerRegistryImpl - Deserializer for key msgVersion: 4 objectClass: org.opendaylight.yang.gen.v1.urn.opendaylight.openflow.oxm.rev130731.oxm.fields.grouping.MatchEntries msgType: 1 oxm_field: 31 experimenterID: null overwritten. Old deserializer: org.opendaylight.openflowjava.protocol.impl.deserialization.match.NxmTunnelIpv4SrcDeserializer, new deserializer: org.opendaylight.openflowjava.nx.codec.match.TunIpv4SrcCodec
2014-09-05 19:42:41.479 BST [config-pusher] WARN o.o.o.p.i.d.DeserializerRegistryImpl - Deserializer for key msgVersion: 4 objectClass: org.opendaylight.yang.gen.v1.urn.opendaylight.openflow.oxm.rev130731.oxm.fields.grouping.MatchEntries msgType: 1 oxm_field: 31 experimenterID: null overwritten. Old deserializer: org.opendaylight.openflowjava.protocol.impl.deserialization.match.NxmTunnelIpv4SrcDeserializer, new deserializer: org.opendaylight.openflowjava.nx.codec.match.TunIpv4SrcCodec
2014-09-05 19:42:41.528 BST [config-pusher] WARN o.o.o.p.i.d.DeserializerRegistryImpl - Deserializer for key msgVersion: 1 objectClass: org.opendaylight.yang.gen.v1.urn.opendaylight.openflow.common.action.rev130731.actions.grouping.Action msgType: 65535 experimenterID: 8992 overwritten. Old deserializer: org.opendaylight.openflowjava.nx.api.impl.ActionDeserializer, new deserializer: org.opendaylight.openflowjava.nx.api.impl.ActionDeserializer
2014-09-05 19:42:41.528 BST [config-pusher] WARN o.o.o.p.i.d.DeserializerRegistryImpl - Deserializer for key msgVersion: 1 objectClass: org.opendaylight.yang.gen.v1.urn.opendaylight.openflow.common.action.rev130731.actions.grouping.Action msgType: 65535 experimenterID: 8992 overwritten. Old deserializer: org.opendaylight.openflowjava.nx.api.impl.ActionDeserializer, new deserializer: org.opendaylight.openflowjava.nx.api.impl.ActionDeserializer
2014-09-05 19:42:41.529 BST [config-pusher] WARN o.o.o.p.i.d.DeserializerRegistryImpl - Deserializer for key msgVersion: 4 objectClass: org.opendaylight.yang.gen.v1.urn.opendaylight.openflow.common.action.rev130731.actions.grouping.Action msgType: 65535 experimenterID: 8992 overwritten. Old deserializer: org.opendaylight.openflowjava.nx.api.impl.ActionDeserializer, new deserializer: org.opendaylight.openflowjava.nx.api.impl.ActionDeserializer
2014-09-05 19:42:41.529 BST [config-pusher] WARN o.o.o.p.i.d.DeserializerRegistryImpl - Deserializer for key msgVersion: 4 objectClass: org.opendaylight.yang.gen.v1.urn.opendaylight.openflow.common.action.rev130731.actions.grouping.Action msgType: 65535 experimenterID: 8992 overwritten. Old deserializer: org.opendaylight.openflowjava.nx.api.impl.ActionDeserializer, new deserializer: org.opendaylight.openflowjava.nx.api.impl.ActionDeserializer