Error in logs for JIRA look and feel plugin on startup

@400000004e0c1ce41f54c274 2011-06-30 16:51:06,523 main ERROR      [atlassian.plugin.loaders.ScanningPluginLoader] Unable to deploy plugin 'null', file 
Unit: /data/jirastudio/jira/home/plugins/.bundled-plugins/jira-lookandfeel-plugin-4.4-studio-SNAPSHOT.jar (1309326300000)
@400000004e0c1ce41f54d214 com.atlassian.plugin.PluginParseException: Cannot parse XML plugin descriptor
@400000004e0c1ce41f54d5fc       at com.atlassian.plugin.parsers.XmlDescriptorParser.createDocument(XmlDescriptorParser.java:98)
@400000004e0c1ce41f54ddcc       at com.atlassian.plugin.parsers.XmlDescriptorParser.<init>(XmlDescriptorParser.java:77)
@400000004e0c1ce41f552fd4       at com.atlassian.plugin.osgi.factory.OsgiPluginXmlDescriptorParser.<init>(OsgiPluginXmlDescriptorParser.java:30)
@400000004e0c1ce41f5533bc       at com.atlassian.plugin.osgi.factory.OsgiPluginXmlDescriptorParserFactory.getInstance(OsgiPluginXmlDescriptorParserFactory.java:27)
@400000004e0c1ce41f5537a4       at com.atlassian.plugin.osgi.factory.OsgiPluginFactory.getPluginKeyFromDescriptor(OsgiPluginFactory.java:198)
@400000004e0c1ce41f553f74       at com.atlassian.plugin.osgi.factory.OsgiPluginFactory.canCreate(OsgiPluginFactory.java:132)
@400000004e0c1ce41f55435c       at com.atlassian.jira.plugin.MasterPluginFactory.canCreate(MasterPluginFactory.java:50)
@400000004e0c1ce41f5581dc       at com.atlassian.plugin.loaders.ScanningPluginLoader.deployPluginFromUnit(ScanningPluginLoader.java:113)
@400000004e0c1ce41f5585c4       at com.atlassian.plugin.loaders.ScanningPluginLoader.loadAllPlugins(ScanningPluginLoader.java:89)
@400000004e0c1ce41f5589ac       at com.atlassian.plugin.manager.DefaultPluginManager.init(DefaultPluginManager.java:136)
@400000004e0c1ce41f558d94       at com.atlassian.jira.plugin.JiraPluginManager.start(JiraPluginManager.java:61)
@400000004e0c1ce41f559564       at com.atlassian.jira.ComponentManager$PluginSystem.start(ComponentManager.java:684)
@400000004e0c1ce41f55994c       at com.atlassian.jira.ComponentManager.startPluginSystem(ComponentManager.java:243)
@400000004e0c1ce41f559d34       at com.atlassian.jira.ComponentManager.quickStart(ComponentManager.java:236)
@400000004e0c1ce41f55a11c       at com.atlassian.jira.ComponentManager.start(ComponentManager.java:221)
@400000004e0c1ce41f55a8ec       at com.atlassian.jira.upgrade.PluginSystemLauncher.start(PluginSystemLauncher.java:23)
@400000004e0c1ce41f55a8ec       at com.atlassian.jira.startup.DefaultJiraLauncher$3.run(DefaultJiraLauncher.java:101)
@400000004e0c1ce41f55acd4       at com.atlassian.jira.config.database.DatabaseConfigurationManagerImpl.doNowOrEnqueue(DatabaseConfigurationManagerImpl.java:250)
@400000004e0c1ce41f55bc74       at com.atlassian.jira.config.database.DatabaseConfigurationManagerImpl.doNowOrWhenDatabaseActivated(DatabaseConfigurationManagerImpl.java:149)
@400000004e0c1ce41f55c444       at com.atlassian.jira.startup.DefaultJiraLauncher.postDbLaunch(DefaultJiraLauncher.java:94)
@400000004e0c1ce41f55c82c       at com.atlassian.jira.startup.DefaultJiraLauncher.access$100(DefaultJiraLauncher.java:24)
@400000004e0c1ce41f55cffc       at com.atlassian.jira.startup.DefaultJiraLauncher$1.run(DefaultJiraLauncher.java:61)
@400000004e0c1ce41f55d3e4       at com.atlassian.jira.util.devspeed.JiraDevSpeedTimer.run(JiraDevSpeedTimer.java:33)
@400000004e0c1ce41f55d7cc       at com.atlassian.jira.startup.DefaultJiraLauncher.start(DefaultJiraLauncher.java:56)
@400000004e0c1ce41f55d7cc       at com.atlassian.jira.startup.LauncherContextListener$1.create(LauncherContextListener.java:57)
@400000004e0c1ce41f55df9c       at com.atlassian.jira.startup.LauncherContextListener$1.create(LauncherContextListener.java:52)
@400000004e0c1ce41f55e384       at com.atlassian.multitenant.impl.MultiTenantComponentMapImpl.get(MultiTenantComponentMapImpl.java:121)
@400000004e0c1ce41f55eb54       at com.atlassian.multitenant.impl.MultiTenantComponentMapImpl.onTenantStart(MultiTenantComponentMapImpl.java:165)
@400000004e0c1ce41f55f324       at com.atlassian.multitenant.impl.DefaultMultiTenantManager$1.consume(DefaultMultiTenantManager.java:134)
@400000004e0c1ce41f55fedc       at com.atlassian.multitenant.impl.DefaultMultiTenantManager$1.consume(DefaultMultiTenantManager.java:131)
@400000004e0c1ce41f5606ac       at com.atlassian.multitenant.impl.DefaultMultiTenantManager.runForEachListener(DefaultMultiTenantManager.java:256)
@400000004e0c1ce41f560a94       at com.atlassian.multitenant.impl.DefaultMultiTenantManager.startTenant(DefaultMultiTenantManager.java:130)
@400000004e0c1ce41f561264       at com.atlassian.multitenant.impl.DefaultMultiTenantManager.startAll(DefaultMultiTenantManager.java:203)
@400000004e0c1ce41f56164c       at com.atlassian.jira.startup.LauncherContextListener.contextInitialized(LauncherContextListener.java:85)
@400000004e0c1ce41f561a34       at org.apache.catalina.core.StandardContext.listenerStart(StandardContext.java:4205)
@400000004e0c1ce41f561e1c       at org.apache.catalina.core.StandardContext.start(StandardContext.java:4704)
@400000004e0c1ce41f5625ec       at org.apache.catalina.core.ContainerBase.addChildInternal(ContainerBase.java:799)
@400000004e0c1ce41f5629d4       at org.apache.catalina.core.ContainerBase.addChild(ContainerBase.java:779)
@400000004e0c1ce41f5629d4       at org.apache.catalina.core.StandardHost.addChild(StandardHost.java:601)
@400000004e0c1ce41f563974       at org.apache.catalina.startup.HostConfig.deployDescriptor(HostConfig.java:675)
@400000004e0c1ce41f563d5c       at org.apache.catalina.startup.HostConfig.deployDescriptors(HostConfig.java:601)
@400000004e0c1ce41f564144       at org.apache.catalina.startup.HostConfig.deployApps(HostConfig.java:502)
@400000004e0c1ce41f56452c       at org.apache.catalina.startup.HostConfig.start(HostConfig.java:1315)
@400000004e0c1ce41f5658b4       at org.apache.catalina.startup.HostConfig.lifecycleEvent(HostConfig.java:324)
@400000004e0c1ce41f565c9c       at org.apache.catalina.util.LifecycleSupport.fireLifecycleEvent(LifecycleSupport.java:142)
@400000004e0c1ce41f566084       at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1061)
@400000004e0c1ce41f56646c       at org.apache.catalina.core.StandardHost.start(StandardHost.java:840)
@400000004e0c1ce41f56646c       at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1053)
@400000004e0c1ce41f566c3c       at org.apache.catalina.core.StandardEngine.start(StandardEngine.java:463)
@400000004e0c1ce41f567024       at org.apache.catalina.core.StandardService.start(StandardService.java:525)
@400000004e0c1ce41f56740c       at org.apache.catalina.core.StandardServer.start(StandardServer.java:754)
@400000004e0c1ce41f5677f4       at org.apache.catalina.startup.Catalina.start(Catalina.java:595)
@400000004e0c1ce41f567bdc       at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
@400000004e0c1ce41f568f64       at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
@400000004e0c1ce41f56934c       at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
@400000004e0c1ce41f569734       at java.lang.reflect.Method.invoke(Method.java:597)
@400000004e0c1ce41f569b1c       at org.apache.catalina.startup.Bootstrap.start(Bootstrap.java:289)
@400000004e0c1ce41f569f04       at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:414)
@400000004e0c1ce41f56a6d4 Caused by: org.dom4j.DocumentException: Error on line -1 of document  : Premature end of file. Nested exception: Premature end of file.
@400000004e0c1ce41f56aabc       at org.dom4j.io.SAXReader.read(SAXReader.java:355)
@400000004e0c1ce41f56aea4       at org.dom4j.io.SAXReader.read(SAXReader.java:261)
@400000004e0c1ce41f56aea4       at com.atlassian.plugin.parsers.XmlDescriptorParser.createDocument(XmlDescriptorParser.java:94)
@400000004e0c1ce41f56b674       ... 57 more