HistoryRequest since... Unparseable Date Error

I'm using XIFF to talk to Openfire and sending the following stanza to Openfire when I join a permanent chat room.

</x>

</presence>

According to the XMPP.org spec, the format of my dateTime for history since is perfectly syntactically correct.

The openfire error log shows that it is unable to parse this date. WHY???

2011.02.16 19:55:57 [org.jivesoftware.openfire.muc.HistoryRequest.<init>(HistoryRequest.java:73)] Error parsing date from history management

java.text.ParseException: Unparseable date: "2011-02-16T18:28:59Z"

at java.text.DateFormat.parse(DateFormat.java:337)

at org.jivesoftware.openfire.muc.HistoryRequest.<init>(HistoryRequest.java:69)

at org.jivesoftware.openfire.muc.spi.LocalMUCUser.process(LocalMUCUser.java:444)

at org.jivesoftware.openfire.muc.spi.LocalMUCUser.process(LocalMUCUser.java:164)

at org.jivesoftware.openfire.muc.spi.MultiUserChatServiceImpl.processPacket(MultiU serChatServiceImpl.java:275)

at org.jivesoftware.openfire.component.InternalComponentManager$RoutableComponents .process(InternalComponentManager.java:619)

at org.jivesoftware.openfire.spi.RoutingTableImpl.routePacket(RoutingTableImpl.jav a:260)

at org.jivesoftware.openfire.PresenceRouter.handle(PresenceRouter.java:164)

at org.jivesoftware.openfire.PresenceRouter.route(PresenceRouter.java:70)

at org.jivesoftware.openfire.spi.PacketRouterImpl.route(PacketRouterImpl.java:76)

at org.jivesoftware.openfire.net.StanzaHandler.processPresence(StanzaHandler.java: 337)

at org.jivesoftware.openfire.net.ClientStanzaHandler.processPresence(ClientStanzaH andler.java:85)

at org.jivesoftware.openfire.net.StanzaHandler.process(StanzaHandler.java:254)

at org.jivesoftware.openfire.net.StanzaHandler.process(StanzaHandler.java:176)

at org.jivesoftware.openfire.nio.ConnectionHandler.messageReceived(ConnectionHandl er.java:133)

at org.apache.mina.common.support.AbstractIoFilterChain$TailFilter.messageReceived (AbstractIoFilterChain.java:570)

at org.apache.mina.common.support.AbstractIoFilterChain.callNextMessageReceived(Ab stractIoFilterChain.java:299)

at org.apache.mina.common.support.AbstractIoFilterChain.access$1100(AbstractIoFilt erChain.java:53)

at org.apache.mina.common.support.AbstractIoFilterChain$EntryImpl$1.messageReceive d(AbstractIoFilterChain.java:648)

at org.apache.mina.common.IoFilterAdapter.messageReceived(IoFilterAdapter.java:80)

at org.apache.mina.common.support.AbstractIoFilterChain.callNextMessageReceived(Ab stractIoFilterChain.java:299)

at org.apache.mina.common.support.AbstractIoFilterChain.access$1100(AbstractIoFilt erChain.java:53)

at org.apache.mina.common.support.AbstractIoFilterChain$EntryImpl$1.messageReceive d(AbstractIoFilterChain.java:648)

at org.apache.mina.filter.codec.support.SimpleProtocolDecoderOutput.flush(SimplePr otocolDecoderOutput.java:58)

at org.apache.mina.filter.codec.ProtocolCodecFilter.messageReceived(ProtocolCodecF ilter.java:185)

at org.apache.mina.common.support.AbstractIoFilterChain.callNextMessageReceived(Ab stractIoFilterChain.java:299)

at org.apache.mina.common.support.AbstractIoFilterChain.access$1100(AbstractIoFilt erChain.java:53)

at org.apache.mina.common.support.AbstractIoFilterChain$EntryImpl$1.messageReceive d(AbstractIoFilterChain.java:648)

at org.apache.mina.filter.executor.ExecutorFilter.processEvent(ExecutorFilter.java :239)

at org.apache.mina.filter.executor.ExecutorFilter$ProcessEventsRunnable.run(Execut orFilter.java:283)

at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java: 886)

at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)

at org.apache.mina.util.NamePreservingRunnable.run(NamePreservingRunnable.java:51)

at java.lang.Thread.run(Thread.java:619)