When using faultStackTraceEnabled = true and exceptionMessageCauseEnabled = true, it's have the soap message enriched with the exception that caused a fault to be generated. The stackTrace element, though, does not include the (class) name of the exception that's been thrown.
I tried a naive fix (i.e. adding sb.append(throwable.getClass().getCanonicalName() + " : " + throwable.getMessage() + "\n"); into the AbstractSoapInterceptor::prepareStackTrace(..) method), but it seems the whole fix for
CXF-3445 should be revisited (including client side).