Crowd logs a warning about Incremental Synchronization even when it is not enabled

2013-04-01 10:00:03,234 QuartzWorker-0 WARN [directory.ldap.cache.EventTokenChangedCacheRefresher] Incremental synchronisation is not available. Falling back to full synchronisation
com.atlassian.crowd.event.IncrementalSynchronisationNotAvailableException: Incremental synchronisation is not guaranteed to be available
 at com.atlassian.crowd.integration.rest.service.RestCrowdClient.getCurrentEventToken(RestCrowdClient.java:948)
 at com.atlassian.crowd.directory.RemoteCrowdDirectory.getCurrentEventToken(RemoteCrowdDirectory.java:651)
 at com.atlassian.crowd.directory.ldap.cache.EventTokenChangedCacheRefresher.synchroniseAll(EventTokenChangedCacheRefresher.java:45)
 at com.atlassian.crowd.directory.DbCachingRemoteDirectory.synchroniseCache(DbCachingRemoteDirectory.java:619)
 at com.atlassian.crowd.manager.directory.DirectorySynchroniserImpl.synchronise(DirectorySynchroniserImpl.java:63)
 at com.atlassian.crowd.directory.DbCachingDirectoryPoller.pollChanges(DbCachingDirectoryPoller.java:50)
 at com.atlassian.crowd.manager.directory.monitor.poller.DirectoryPollerJob.execute(DirectoryPollerJob.java:34)