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Openfire Error Log - Concerned?

I keep getting the following errors in my error log. I think I saw some where that people have stated nothing should be showing up in the error log. Can anyone tell me if I should be concerned about these errors?

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$Worker.runTask(Unknown Source) at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source) at org.apache.mina.util.NamePreservingRunnable.run(NamePreservingRunnable.java:51) at java.lang.Thread.run(Unknown Source) 2014.01.07 08:49:18 org.jivesoftware.openfire.handler.IQHandler - Internal server error java.lang.NullPointerException at java.util.regex.Matcher.quoteReplacement(Unknown Source) at org.jivesoftware.openfire.ldap.LdapVCardProvider$VCard.treeWalk(LdapVCardProvid er.java:543) at org.jivesoftware.openfire.ldap.LdapVCardProvider$VCard.treeWalk(LdapVCardProvid er.java:547) at org.jivesoftware.openfire.ldap.LdapVCardProvider$VCard.getVCard(LdapVCardProvid er.java:524) at org.jivesoftware.openfire.ldap.LdapVCardProvider.loadVCard(LdapVCardProvider.ja va:234) at org.jivesoftware.openfire.vcard.VCardManager.getOrLoadVCard(VCardManager.java:2 39) at org.jivesoftware.openfire.vcard.VCardManager.getVCard(VCardManager.java:232) at org.jivesoftware.openfire.handler.IQvCardHandler.handleIQ(IQvCardHandler.java:1 20) at org.jivesoftware.openfire.handler.IQHandler.process(IQHandler.java:65) at org.jivesoftware.openfire.IQRouter.handle(IQRouter.java:374) at org.jivesoftware.openfire.IQRouter.route(IQRouter.java:121) at org.jivesoftware.openfire.spi.PacketRouterImpl.route(PacketRouterImpl.java:76) at org.jivesoftware.openfire.net.StanzaHandler.processIQ(StanzaHandler.java:337) at org.jivesoftware.openfire.net.ClientStanzaHandler.processIQ(ClientStanzaHandler .java:93) at org.jivesoftware.openfire.net.StanzaHandler.process(StanzaHandler.java:302) at org.jivesoftware.openfire.net.StanzaHandler.process(StanzaHandler.java:194) at org.jivesoftware.openfire.nio.ConnectionHandler.messageReceived(ConnectionHandl er.java:181) at org.apache.mina.common.support.AbstractIoFilterChain$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$Worker.runTask(Unknown Source) at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source) at org.apache.mina.util.NamePreservingRunnable.run(NamePreservingRunnable.java:51) at java.lang.Thread.run(Unknown Source)