Hi!
I have configured mirroring between two sites. The job is supposed to mirror just a part (tree) of the strcture, not the complete site.
When the job ran for the first time, I got several error-messages similar to the one below. Even though EPiServer reported that the mirroring failed, it seems like the content was mirrored anyway. Both pages, pictures and documents are to find on the destination site, and the site works without problems as far as I can see.

After a few days and several successful updates, the mirroring fails again. The queu builds up, and now counting 22 (runs every hour).

This is what I find in the error-log on the sender site. The error-log on the destination site has no errors related to the mirroring.

Any suggestions on what to do to solve this?

2009-11-24 16:55:01,972 ERROR [8] EPiServer.Enterprise.Mirroring.MirroringManager.Execute - 10.1.6 Error executing Channel "Internet" Destination "ExtSite".
Microsoft.Web.Services3.ResponseProcessingException: WSE910: An error happened during the processing of a response message, and you can find the error in the inner exception.  You can also find the response message in the Response property. ---> System.Xml.XmlException: Data at the root level is invalid. Line 1, position 1.
   at System.Xml.XmlTextReaderImpl.Throw(Exception e)
   at System.Xml.XmlTextReaderImpl.ParseRootLevelWhitespace()
   at System.Xml.XmlTextReaderImpl.ParseDocumentContent()
   at Microsoft.Web.Services3.Xml.XmlSkipDTDReader.Read()
   at System.Xml.XmlLoader.Load(XmlDocument doc, XmlReader reader, Boolean preserveWhitespace)
   at System.Xml.XmlDocument.Load(XmlReader reader)
   at Microsoft.Web.Services3.SoapEnvelope.Load(Stream inStream)
   at Microsoft.Web.Services3.Xml.SoapEnvelopeReaderWrapper..ctor(SoapClientMessage message, String messageContentType)
   --- End of inner exception stack trace ---
   at Microsoft.Web.Services3.Xml.SoapEnvelopeReaderWrapper..ctor(SoapClientMessage message, String messageContentType)
   at Microsoft.Web.Services3.WebServicesClientProtocol.GetReaderForMessage(SoapClientMessage message, Int32 bufferSize)
   at System.Web.Services.Protocols.SoapHttpClientProtocol.ReadResponse(SoapClientMessage message, WebResponse response, Stream responseStream, Boolean asyncCall)
   at System.Web.Services.Protocols.SoapHttpClientProtocol.Invoke(String methodName, Object[] parameters)
   at EPiServer.WebServices.PageMirroringClient.ImportExportFile(Guid context, Guid[] linkcontext, PageReference destinationRoot, Boolean publishPages, Boolean ignorePageHierarchy, Byte[] fileContent)
   at EPiServer.WebServices.PageMirroringClient.ImportExportFile(Guid context, Guid[] linkcontext, PageReference destinationRoot, Boolean publishPages, Boolean ignorePageHierarchy, String packageFilePath)
   at EPiServer.Enterprise.Mirroring.Destinations.PageMirroring.TransmitExportPackage(RemoteSite site, Guid channelId, Guid[] itemguids, PageReference remotePageLink, Boolean remoteInstantPublish, Boolean ignorePageHierarchy, String packageFilePath, StatusInfo status)
   at EPiServer.Enterprise.Mirroring.Destinations.PageMirroring.Send(MirroringInfo channel, DestinationInfo pub, Boolean ignorePageHierarchy, DataExporter exporter)
   at EPiServer.Enterprise.Mirroring.Destinations.PageMirroring.SendQueue(MirroringInfo info, DestinationInfo pub)
   at EPiServer.Enterprise.Mirroring.MirroringManager.Execute(MirroringInfo info)
2009-11-24 16:55:01,988 ERROR [8] EPiServer.DataAbstraction.ScheduledJob.InternalExec - 3.1.2 Failed to execute job 127fee82-2fa7-46dd-84e5-e51b8b55f4ec
EPiServer.Core.EPiServerException: <br />Error executing Channel "Internet" Destination "ExtSite". WSE910: An error happened during the processing of a response message, and you can find the error in the inner exception.  You can also find the response message in the Response property.
   at EPiServer.Enterprise.Mirroring.MirroringManager.Execute()