BaseDN without an OU does not work when setting up a directory in JIRA

2011-03-16 14:59:06,599 QuartzWorker-0 INFO ServiceRunner     [atlassian.crowd.directory.DbCachingRemoteDirectory] synchronisation complete in [ 26ms ]
2011-03-16 14:59:06,648 QuartzWorker-0 ERROR ServiceRunner     [atlassian.crowd.directory.DbCachingDirectoryPoller] Error occurred while refreshing the cache for directory [ 10000 ].
com.atlassian.crowd.exception.OperationFailedException: java.util.concurrent.ExecutionException: com.atlassian.crowd.exception.OperationFailedException: org.springframework.ldap.PartialResultException: nested exception is javax.naming.PartialResultException [Root exception is javax.naming.CommunicationException: mycompany.com:389 [Root exception is java.net.UnknownHostException: mycompany.com]]
	at com.atlassian.crowd.directory.ldap.cache.UsnChangedCacheRefresher.synchroniseAllUsers(UsnChangedCacheRefresher.java:255)
	at com.atlassian.crowd.directory.ldap.cache.AbstractCacheRefresher.synchroniseAll(AbstractCacheRefresher.java:34)
...
Caused by: java.util.concurrent.ExecutionException: com.atlassian.crowd.exception.OperationFailedException: org.springframework.ldap.PartialResultException: nested exception is javax.naming.PartialResultException [Root exception is javax.naming.CommunicationException: mycompany.com:389 [Root exception is java.net.UnknownHostException: mycompany.com]]
	at java.util.concurrent.FutureTask$Sync.innerGet(FutureTask.java:222)
	at java.util.concurrent.FutureTask.get(FutureTask.java:83)
	at com.atlassian.crowd.directory.ldap.cache.UsnChangedCacheRefresher.synchroniseAllUsers(UsnChangedCacheRefresher.java:237)
	... 10 more
Caused by: com.atlassian.crowd.exception.OperationFailedException: org.springframework.ldap.PartialResultException: nested exception is javax.naming.PartialResultException [Root exception is javax.naming.CommunicationException: mycompany.com:389 [Root exception is java.net.UnknownHostException: mycompany.com]]
	at com.atlassian.crowd.directory.SpringLDAPConnector.pageSearchResults(SpringLDAPConnector.java:352)
	at com.atlassian.crowd.directory.SpringLDAPConnector.searchEntitiesWithRequestControls(SpringLDAPConnector.java:386)
...
Caused by: org.springframework.ldap.PartialResultException: nested exception is javax.naming.PartialResultException [Root exception is javax.naming.CommunicationException: mycompany.com:389 [Root exception is java.net.UnknownHostException: mycompany.com]]
	at org.springframework.ldap.support.LdapUtils.convertLdapException(LdapUtils.java:203)
	at org.springframework.ldap.core.LdapTemplate.search(LdapTemplate.java:315)
...
Caused by: javax.naming.PartialResultException [Root exception is javax.naming.CommunicationException: mycompany.com:389 [Root exception is java.net.UnknownHostException: mycompany.com]]
	at com.sun.jndi.ldap.LdapNamingEnumeration.hasMoreImpl(LdapNamingEnumeration.java:224)
	at com.sun.jndi.ldap.LdapNamingEnumeration.hasMore(LdapNamingEnumeration.java:171)
	at org.springframework.ldap.core.LdapTemplate.search(LdapTemplate.java:295)
	... 13 more
Caused by: javax.naming.CommunicationException: mycompany.com:389 [Root exception is java.net.UnknownHostException: mycompany.com]
	at com.sun.jndi.ldap.LdapReferralContext.<init>(LdapReferralContext.java:74)
	at com.sun.jndi.ldap.LdapReferralException.getReferralContext(LdapReferralException.java:132)
	at com.sun.jndi.ldap.LdapNamingEnumeration.hasMoreReferrals(LdapNamingEnumeration.java:339)
	at com.sun.jndi.ldap.LdapNamingEnumeration.hasMoreImpl(LdapNamingEnumeration.java:208)
	... 15 more
Caused by: java.net.UnknownHostException: mycompany.com
	at java.net.PlainSocketImpl.connect(PlainSocketImpl.java:195)
	at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:432)