Accessing Users/Groups fails with Illegal JID: ifa meeting room 1

I just installed 2.6.2 to a fresh DB2 database, have gone through most configuration, just clicked on Users/Groups tab and got:

Stack

HTTP ERROR: 500

Illegal JID: ifa meeting room 1

RequestURI=/user-summary.jsp

Caused by:

java.lang.IllegalArgumentException: Illegal JID: ifa meeting room 1
 at org.xmpp.packet.JID.init(JID.java:396)
 at org.xmpp.packet.JID.(JID.java:231)
 at org.jivesoftware.openfire.ldap.LdapUserProvider.loadUser(LdapUserProvider.java:71)
 at org.jivesoftware.openfire.user.UserManager.getUser(UserManager.java:213)
 at org.jivesoftware.openfire.user.UserCollection$UserIterator.getNextElement(UserCollection.java:95)
 at org.jivesoftware.openfire.user.UserCollection$UserIterator.hasNext(UserCollection.java:58)
 at org.jivesoftware.openfire.admin.user_002dsummary_jsp._jspService(user_002dsummary_jsp.java:234)
 at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:97)
 at javax.servlet.http.HttpServlet.service(HttpServlet.java:820)
 at org.mortbay.jetty.servlet.ServletHolder.handle(ServletHolder.java:487)
 at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1093)
 at com.opensymphony.module.sitemesh.filter.PageFilter.parsePage(PageFilter.java:118)
 at com.opensymphony.module.sitemesh.filter.PageFilter.doFilter(PageFilter.java:52)
 at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1084)
 at org.jivesoftware.util.LocaleFilter.doFilter(LocaleFilter.java:66)
 at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1084)
 at org.jivesoftware.util.SetCharacterEncodingFilter.doFilter(SetCharacterEncodingFilter.java:42)
 at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1084)
 at org.jivesoftware.admin.PluginFilter.doFilter(PluginFilter.java:70)
 at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1084)
 at org.jivesoftware.admin.AuthCheckFilter.doFilter(AuthCheckFilter.java:146)
 at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1084)
 at org.mortbay.jetty.servlet.ServletHandler.handle(ServletHandler.java:360)
 at org.mortbay.jetty.security.SecurityHandler.handle(SecurityHandler.java:216)
 at org.mortbay.jetty.servlet.SessionHandler.handle(SessionHandler.java:181)
 at org.mortbay.jetty.handler.ContextHandler.handle(ContextHandler.java:726)
 at org.mortbay.jetty.webapp.WebAppContext.handle(WebAppContext.java:405)
 at org.mortbay.jetty.handler.ContextHandlerCollection.handle(ContextHandlerCollection.java:206)
 at org.mortbay.jetty.handler.HandlerCollection.handle(HandlerCollection.java:114)
 at org.mortbay.jetty.handler.HandlerWrapper.handle(HandlerWrapper.java:152)
 at org.mortbay.jetty.Server.handle(Server.java:324)
 at org.mortbay.jetty.HttpConnection.handleRequest(HttpConnection.java:505)
 at org.mortbay.jetty.HttpConnection$RequestHandler.headerComplete(HttpConnection.java:829)
 at org.mortbay.jetty.HttpParser.parseNext(HttpParser.java:514)
 at org.mortbay.jetty.HttpParser.parseAvailable(HttpParser.java:211)
 at org.mortbay.jetty.HttpConnection.handle(HttpConnection.java:380)
 at org.mortbay.io.nio.SelectChannelEndPoint.run(SelectChannelEndPoint.java:395)
 at org.mortbay.thread.QueuedThreadPool$PoolThread.run(QueuedThreadPool.java:488)
Caused by: org.jivesoftware.stringprep.IDNAException: Contains non-LDH characters.
 at org.jivesoftware.stringprep.IDNA.toASCII(IDNA.java:106)
 at org.jivesoftware.stringprep.IDNA.toASCII(IDNA.java:53)
 at org.xmpp.packet.JID.init(JID.java:367)
 ... 37 more

Caused by:

org.jivesoftware.stringprep.IDNAException: Contains non-LDH characters.
 at org.jivesoftware.stringprep.IDNA.toASCII(IDNA.java:106)
 at org.jivesoftware.stringprep.IDNA.toASCII(IDNA.java:53)
 at org.xmpp.packet.JID.init(JID.java:367)
 at org.xmpp.packet.JID.(JID.java:231)
 at org.jivesoftware.openfire.ldap.LdapUserProvider.loadUser(LdapUserProvider.java:71)
 at org.jivesoftware.openfire.user.UserManager.getUser(UserManager.java:213)
 at org.jivesoftware.openfire.user.UserCollection$UserIterator.getNextElement(UserCollection.java:95)
 at org.jivesoftware.openfire.user.UserCollection$UserIterator.hasNext(UserCollection.java:58)
 at org.jivesoftware.openfire.admin.user_002dsummary_jsp._jspService(user_002dsummary_jsp.java:234)
 at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:97)
 at javax.servlet.http.HttpServlet.service(HttpServlet.java:820)
 at org.mortbay.jetty.servlet.ServletHolder.handle(ServletHolder.java:487)
 at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1093)
 at com.opensymphony.module.sitemesh.filter.PageFilter.parsePage(PageFilter.java:118)
 at com.opensymphony.module.sitemesh.filter.PageFilter.doFilter(PageFilter.java:52)
 at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1084)
 at org.jivesoftware.util.LocaleFilter.doFilter(LocaleFilter.java:66)
 at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1084)
 at org.jivesoftware.util.SetCharacterEncodingFilter.doFilter(SetCharacterEncodingFilter.java:42)
 at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1084)
 at org.jivesoftware.admin.PluginFilter.doFilter(PluginFilter.java:70)
 at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1084)
 at org.jivesoftware.admin.AuthCheckFilter.doFilter(AuthCheckFilter.java:146)
 at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1084)
 at org.mortbay.jetty.servlet.ServletHandler.handle(ServletHandler.java:360)
 at org.mortbay.jetty.security.SecurityHandler.handle(SecurityHandler.java:216)
 at org.mortbay.jetty.servlet.SessionHandler.handle(SessionHandler.java:181)
 at org.mortbay.jetty.handler.ContextHandler.handle(ContextHandler.java:726)
 at org.mortbay.jetty.webapp.WebAppContext.handle(WebAppContext.java:405)
 at org.mortbay.jetty.handler.ContextHandlerCollection.handle(ContextHandlerCollection.java:206)
 at org.mortbay.jetty.handler.HandlerCollection.handle(HandlerCollection.java:114)
 at org.mortbay.jetty.handler.HandlerWrapper.handle(HandlerWrapper.java:152)
 at org.mortbay.jetty.Server.handle(Server.java:324)
 at org.mortbay.jetty.HttpConnection.handleRequest(HttpConnection.java:505)
 at org.mortbay.jetty.HttpConnection$RequestHandler.headerComplete(HttpConnection.java:829)
 at org.mortbay.jetty.HttpParser.parseNext(HttpParser.java:514)
 at org.mortbay.jetty.HttpParser.parseAvailable(HttpParser.java:211)
 at org.mortbay.jetty.HttpConnection.handle(HttpConnection.java:380)
 at org.mortbay.io.nio.SelectChannelEndPoint.run(SelectChannelEndPoint.java:395)
 at org.mortbay.thread.QueuedThreadPool$PoolThread.run(QueuedThreadPool.java:488)

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