We are seeing a problem where messages suddenly will start looping: If I'm chatting with user A, I will be receiving all of his messages over and over, at 3-4 seconds interval. If user A types "hello" and then "how are you?" then I will be receiving "hello" and "how are you?" endlessly until he quits.

At the same intervals as the repeats, Openfire will log the following:

2008.02.04 20:09:54 [org.jivesoftware.openfire.handler.IQHandler.process(IQHandler.java:68)] Internal server error
java.lang.IllegalArgumentException: IQ must be of type 'set' or 'get'. Original IQ: <iq type="result" id="112-29" to="XXXXX" from="XXXXX"><query xmlns="http://jabber.org/protocol/disco#info"><identity category="client" type="pc" name="pidgin"></identity><feature var="jabber:iq:last"></feature><feature var="jabber:iq:oob"></feature><feature var="jabber:iq:time"></feature><feature var="xmpp:urn:time"></feature><feature var="jabber:iq:version"></feature><feature var="jabber:x:conference"></feature><feature var="http://jabber.org/protocol/bytestreams"></feature><feature var="http://jabber.org/protocol/disco#info"></feature><feature var="http://jabber.org/protocol/disco#items"></feature><feature var="http://jabber.org/protocol/muc"></feature><feature var="http://jabber.org/protocol/muc#user"></feature><feature var="http://jabber.org/protocol/si"></feature><feature var="http://jabber.org/protocol/si/profile/file-transfer"></feature><feature var="http://jabber.org/protocol/xhtml-im"></feature><feature var="urn:xmpp:ping"></feature><feature var="http://www.xmpp.org/extensions/xep-0199.html#ns"></feature><feature var="http://jabber.org/protocol/mood"></feature><feature var="http://jabber.org/protocol/mood+notify"></feature><feature var="http://jabber.org/protocol/nick"></feature><feature var="http://jabber.org/protocol/nick+notify"></feature><feature var="http://jabber.org/protocol/tune"></feature><feature var="http://jabber.org/protocol/tune+notify"></feature><feature var="http://www.xmpp.org/extensions/xep-0084.html#ns-metadata"></feature><featu re var="http://www.xmpp.org/extensions/xep-0084.html#ns-data"></feature><feature var="http://www.xmpp.org/extensions/xep-0224.html#ns"></feature><feature var="http://www.xmpp.org/extensions/xep-0084.html#ns-metadata+notify"></feature ><feature var="http://jabber.org/protocol/commands"></feature></query></iq>
     at org.xmpp.packet.IQ.createResultIQ(IQ.java:355)
     at org.jivesoftware.openfire.disco.IQDiscoInfoHandler.handleIQ(IQDiscoInfoHandler. java:99)
     at org.jivesoftware.openfire.handler.IQHandler.process(IQHandler.java:48)
     at org.jivesoftware.openfire.IQRouter.handle(IQRouter.java:348)
     at org.jivesoftware.openfire.IQRouter.route(IQRouter.java:100)
     at org.jivesoftware.openfire.spi.PacketRouterImpl.route(PacketRouterImpl.java:67)
     at org.jivesoftware.openfire.net.StanzaHandler.processIQ(StanzaHandler.java:303)
     at org.jivesoftware.openfire.net.ClientStanzaHandler.processIQ(ClientStanzaHandler .java:78)
     at org.jivesoftware.openfire.net.StanzaHandler.process(StanzaHandler.java:268)
     at org.jivesoftware.openfire.net.StanzaHandler.process(StanzaHandler.java:167)
     at org.jivesoftware.openfire.nio.ConnectionHandler.messageReceived(ConnectionHandl er.java:132)
     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.filter.codec.support.SimpleProtocolDecoderOutput.flush(SimplePr otocolDecoderOutput.java:58)
     at org.apache.mina.filter.codec.ProtocolCodecFilter.messageReceived(ProtocolCodecF ilter.java:173)
     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$Worker.runTask(ThreadPoolExecutor.java: 885)
     at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:907)
     at org.apache.mina.util.NamePreservingRunnable.run(NamePreservingRunnable.java:51)
     at java.lang.Thread.run(Thread.java:619)

It seems to only occur with Adium, so it may be a client problem. I'm working on getting a sniffer in place to get a dump of the XML stream.

This is Openfire 3.4.4 with PostgreSQL on Linux, Sun Java 1.6.0.