- CentOS release 6.5 (2.6.32-358.18.1.el6.x86_64)
- HSQL Database Engine 1.8.0
- 1.7.0_51 Oracle Corporation -- Java HotSpot(TM) Server VM
Also, today I updated the plugin to the latest version too, hoping it would have something to do with the post here 
However now the plugin won't load at all:
2014.02.11 09:03:57 org.jivesoftware.openfire.container.PluginManager - Error loading plugin: /opt/openfire/plugins/search
java.lang.ClassNotFoundException: org.jivesoftware.openfire.plugin.SearchPlugin
at java.net.URLClassLoader$1.run(Unknown Source)
at java.net.URLClassLoader$1.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at org.jivesoftware.openfire.container.PluginManager.loadPlugin(PluginManager.java :420)
at org.jivesoftware.openfire.container.PluginManager.access$300(PluginManager.java :80)
at org.jivesoftware.openfire.container.PluginManager$PluginMonitor.run(PluginManag er.java:1073)
at java.util.concurrent.Executors$RunnableAdapter.call(Unknown Source)
at java.util.concurrent.FutureTask.runAndReset(Unknown Source)
at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$301 (Unknown Source)
at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(Unknow n Source)
at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
at java.lang.Thread.run(Unknown Source)
e.