SonosFaultInterceptor Issue

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I am running Subsonic 6 on a netgear readynas RN102. I am receiving the following in the subsonic log.

WARN SonosFaultInterceptor - Error: org.apache.cxf.interceptor.Fault: Current event not START_ELEMENT or END_ELEMENT
org.apache.cxf.interceptor.Fault: Current event not START_ELEMENT or END_ELEMENT
at org.apache.cxf.interceptor.AbstractFaultChainInitiatorObserver.onMessage(AbstractFaultChainInitiatorObserver.java:73)

This comes about when trying to browse the music library from SONOS and SONOS times with the "Unable to browse" error.

Has anyone experienced same? Is there a solution?