[jcifs] JCIFS 1.1.7 Unverifiable signature: 0.0.0.0<00>/10.1.254.200

[Chris]

I'm using jcifs to allow domain users to logon to an intranet site without 
having to type their passwords.  The JCIFS software communicates with the 
domain server to verify the users.

I just upgraded my version from 1.1.6 to 1.1.7 and am now getting the 
following error in my log files.  The error occurs once every couple logons, 
with no real pattern.  Does anyone have an idea of what might cause this? 

Thanks,
Chris

Exception Message:

WARNING: Servlet.service() for servlet jsp threw exception
jcifs.smb.SmbException: Unverifiable signature: 0.0.0.0<00>/10.1.254.200
	at jcifs.smb.SmbTransport.send(SmbTransport.java:680)
	at jcifs.smb.SmbSession.sessionSetup(SmbSession.java:289)
	at jcifs.smb.SmbSession.send(SmbSession.java:246)
	at jcifs.smb.SmbTree.treeConnect(SmbTree.java:134)
	at jcifs.smb.SmbSession.logon(SmbSession.java:177)
	at jcifs.smb.SmbSession.logon(SmbSession.java:170)
	at jcifs.http.NtlmHttpFilter.doFilter(NtlmHttpFilter.java:155)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter
(ApplicationFilterChain.java:186)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter
(ApplicationFilterChain.java:157)
	at org.apache.catalina.core.StandardWrapperValve.invoke
(StandardWrapperValve.java:214)
	at org.apache.catalina.core.StandardContextValve.invoke
(StandardContextValve.java:178)
	at org.apache.catalina.core.StandardHostValve.invoke
(StandardHostValve.java:126)
	at org.apache.catalina.valves.ErrorReportValve.invoke
(ErrorReportValve.java:105)
	at org.apache.catalina.core.StandardEngineValve.invoke
(StandardEngineValve.java:107)
	at org.apache.catalina.connector.CoyoteAdapter.service
(CoyoteAdapter.java:148)
	at org.apache.coyote.http11.Http11Processor.process
(Http11Processor.java:825)
	at 
org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.processConnecti
on(Http11Protocol.java:731)
	at org.apache.tomcat.util.net.PoolTcpEndpoint.processSocket
(PoolTcpEndpoint.java:526)
	at org.apache.tomcat.util.net.LeaderFollowerWorkerThread.runIt
(LeaderFollowerWorkerThread.java:80)
	at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run
(ThreadPool.java:684)
	at java.lang.Thread.run(Unknown Source)
socket closed: 0.0.0.0<00>/10.1.254.200
java.net.SocketException: socket closed
	at java.net.SocketInputStream.socketRead0(Native Method)
	at java.net.SocketInputStream.read(Unknown Source)
	at jcifs.netbios.SessionServicePacket.readPacketType
(SessionServicePacket.java:68)
	at jcifs.netbios.SocketInputStream.read(SocketInputStream.java:74)
	at jcifs.netbios.SocketInputStream.read(SocketInputStream.java:40)
	at java.io.FilterInputStream.read(Unknown Source)
	at java.io.PushbackInputStream.read(Unknown Source)
	at jcifs.smb.SmbTransport.run(SmbTransport.java:394)
	at java.lang.Thread.run(Unknown Source)