WCF的一个怪异问题，高手请进

今天遇到一个问题，系统基于WCF框架，不同的服务完全相似的代码，一个就报错，一个成功。而且报错的代码其实际顺利运行完毕所有代码，事务也成功地提交了，只是在返回信息时WCF给了一个错误信息：

<Fault xmlns="http://schemas.microsoft.com/ws/2005/05/envelope/none"><Code><Value>Receiver</Value><Subcode><Value xmlns:a="http://schemas.microsoft.com/net/2005/12/windowscommunicationfoundation/dispatcher">a:InternalServiceFault</Value></Subcode></Code><Reason><Text xml:lang="zh-CN">message 对象已被释放。</Text></Reason><Detail><ExceptionDetail xmlns="http://schemas.datacontract.org/2004/07/System.ServiceModel" xmlns:i="http://www.w3.org/2001/XMLSchema-instance"><HelpLink i:nil="true"/><InnerException i:nil="true"/><Message>message 对象已被释放。</Message><StackTrace>   在 System.ServiceModel.Channels.ByteStreamMessage.InternalByteStreamMessage.get_Properties()↵   在 System.ServiceModel.OperationContext.get_IncomingMessageProperties()↵   在 System.ServiceModel.Web.IncomingWebRequestContext.get_UriTemplateMatch()↵   在 System.ServiceModel.Description.WebHttpBehavior.TrySetupJavascriptCallback(String callbackParameterName)↵   在 System.ServiceModel.Dispatcher.JavascriptCallbackMessageInspector.BeforeSendReply(Message& reply, Object correlationState)↵   在 System.ServiceModel.Dispatcher.ImmutableDispatchRuntime.BeforeSendReplyCore(MessageRpc& rpc, Exception& exception, Boolean& thereIsAnUnhandledException)</StackTrace><Type>System.ObjectDisposedException</Type></ExceptionDetail></Detail></Fault>

经过排查，发现是由于Web.Config文件中binging节点的 crossDomainScriptAccessEnabled="true" 属性导致的，去掉后一切正常。微软官方帮助文档说该属性是用来设定是否允许跨域脚本访问，不清楚为何该属性会导致上述问题。只不过我们项目暂时不存在跨域访问问题，故去掉没有大碍。

具体web.config配置文件和代码如下：

<?xml version="1.0" encoding="utf-8"?><configuration>  <system.serviceModel>    <services>      <service behaviorConfiguration="Service.ServiceBehavior" name="VME.Service.PictureService">        <endpoint address="" behaviorConfiguration="VME.Service.ServiceAspNetAjaxBehavior"          binding="webHttpBinding" contract="VME.Contract.IPictureService" bindingConfiguration="webBinding" />      </service>      <service behaviorConfiguration="Service.ServiceBehavior" name="VME.Service.ServiceService">        <endpoint address="" behaviorConfiguration="VME.Service.ServiceAspNetAjaxBehavior"          binding="webHttpBinding" contract="VME.Contract.IServiceService" bindingConfiguration="serviceBinding" />      </service>    </services>    <behaviors>      <endpointBehaviors>        <behavior name="VME.Service.ServiceAspNetAjaxBehavior">          <enableWebScript />        </behavior>      </endpointBehaviors>      <serviceBehaviors>        <behavior name="Service.ServiceBehavior">          <serviceThrottling maxConcurrentCalls="50" maxConcurrentSessions="50" maxConcurrentInstances="50"/>          <serviceMetadata httpGetEnabled="true" httpsGetEnabled="true"/>          <serviceDebug includeExceptionDetailInFaults="true" />          <dataContractSerializer maxItemsInObjectGraph="2147483647"/>        </behavior>      </serviceBehaviors>    </behaviors>    <protocolMapping>      <add binding="webHttpBinding" scheme="http" />    </protocolMapping>    <bindings>      <webHttpBinding>        <binding name="webBinding" useDefaultWebProxy="false" crossDomainScriptAccessEnabled="true"                 maxReceivedMessageSize="2147483647" maxBufferSize="2147483647" maxBufferPoolSize="2147483647"                 sendTimeout="00:01:00" openTimeout="00:01:00" receiveTimeout="00:01:00" closeTimeout="00:01:00"                 transferMode="Streamed" hostNameComparisonMode="StrongWildcard">          <readerQuotas maxArrayLength="2147483647" maxStringContentLength="2147483647" maxDepth="32" maxBytesPerRead="4096" maxNameTableCharCount="16384"/>          <security mode="None"></security>        </binding>        <binding name="serviceBinding" useDefaultWebProxy="false" crossDomainScriptAccessEnabled="true"                 maxReceivedMessageSize="2147483647" maxBufferSize="2147483647" maxBufferPoolSize="2147483647"                 sendTimeout="00:01:00" openTimeout="00:01:00" receiveTimeout="00:01:00" closeTimeout="00:01:00"                 transferMode="Streamed" hostNameComparisonMode="StrongWildcard">          <readerQuotas maxArrayLength="2147483647" maxStringContentLength="2147483647" maxDepth="32" maxBytesPerRead="4096" maxNameTableCharCount="16384"/>          <security mode="None"></security>        </binding>      </webHttpBinding>    </bindings>    <serviceHostingEnvironment aspNetCompatibilityEnabled="true"      multipleSiteBindingsEnabled="true" />  </system.serviceModel></configuration>

[ServiceContract]public interface IPictureService{    [OperationContract]    [WebInvoke(Method = "POST", RequestFormat = WebMessageFormat.Json, ResponseFormat = WebMessageFormat.Json, BodyStyle = WebMessageBodyStyle.WrappedRequest)]    bool SendIdCardPicture(Stream idCardImg);}[ServiceContract]public interface IServiceService{    [OperationContract]    [WebInvoke(Method = "POST", RequestFormat = WebMessageFormat.Json, ResponseFormat = WebMessageFormat.Json, BodyStyle = WebMessageBodyStyle.WrappedRequest)]    bool AddService(Stream service);}

上面IPictureService接口的程序是能正常返回信息，而IServiceService接口的程序就报错。

有高手请给予指点迷津，到底哪里出了问题。