error with eclipse 3.1 rc2

I am getting this exception when I run subclipse 0.9.31 with eclipse
3.1 rc2. Does anyone knows what it means?

java.lang.UnsatisfiedLinkError: notification2
        at org.tigris.subversion.javahl.SVNClient.notification2(Native Method)
        at org.tigris.subversion.javahl.SVNClientSynchronized.notification2(SVNClientSynchronized.java:354)
        at org.tigris.subversion.svnclientadapter.javahl.JhlClientAdapter.<init>(JhlClientAdapter.java:74)
        at org.tigris.subversion.svnclientadapter.javahl.JhlClientAdapterFactory.createSVNClientImpl(JhlClientAdapterFactory.java:33)
        at org.tigris.subversion.svnclientadapter.SVNClientAdapterFactory.createSVNClient(SVNClientAdapterFactory.java:60)
        at org.tigris.subversion.subclipse.core.SVNClientManager.createSVNClient(SVNClientManager.java:112)
        at org.tigris.subversion.subclipse.core.SVNProviderPlugin.createSVNClient(SVNProviderPlugin.java:368)
        at org.tigris.subversion.subclipse.core.status.NonRecursiveStatusUpdateStrategy.updateStatus(NonRecursiveStatusUpdateStrategy.java:47)
        at org.tigris.subversion.subclipse.core.status.StatusCacheManager.getStatus(StatusCacheManager.java:138)
        at org.tigris.subversion.subclipse.core.resources.LocalResource.getStatus(LocalResource.java:158)
        at org.tigris.subversion.subclipse.core.resources.LocalResource.hasRemote(LocalResource.java:151)
        at org.tigris.subversion.subclipse.core.SVNTeamProvider.setProject(SVNTeamProvider.java:80)
        at org.eclipse.team.core.RepositoryProvider.mapNewProvider(RepositoryProvider.java:177)
        at org.eclipse.team.core.RepositoryProvider.mapExistingProvider(RepositoryProvider.java:206)
        at org.eclipse.team.core.RepositoryProvider.getProvider(RepositoryProvider.java:418)
        at org.eclipse.team.internal.core.TeamHookDispatcher.getProvider(TeamHookDispatcher.java:71)
        at org.eclipse.team.internal.core.TeamHookDispatcher.getRuleFactory(TeamHookDispatcher.java:79)
        at org.eclipse.core.internal.resources.Rules.factoryFor(Rules.java:87)
        at org.eclipse.core.internal.resources.Rules.deleteRule(Rules.java:77)
        at org.eclipse.core.internal.resources.Resource.delete(Resource.java:648)
        at org.eclipse.jdt.internal.core.builder.BatchImageBuilder.cleanOutputFolders(BatchImageBuilder.java:126)
        at org.eclipse.jdt.internal.core.builder.JavaBuilder.clean(JavaBuilder.java:247)
        at org.eclipse.core.internal.events.BuildManager$2.run(BuildManager.java:595)
        at org.eclipse.core.internal.runtime.InternalPlatform.run(InternalPlatform.java:1038)
        at org.eclipse.core.runtime.Platform.run(Platform.java:775)
        at org.eclipse.core.internal.events.BuildManager.basicBuild(BuildManager.java:168)
        at org.eclipse.core.internal.events.BuildManager.basicBuild(BuildManager.java:202)
        at org.eclipse.core.internal.events.BuildManager$1.run(BuildManager.java:231)
        at org.eclipse.core.internal.runtime.InternalPlatform.run(InternalPlatform.java:1038)
        at org.eclipse.core.runtime.Platform.run(Platform.java:775)
        at org.eclipse.core.internal.events.BuildManager.basicBuild(BuildManager.java:234)
        at org.eclipse.core.internal.events.BuildManager.basicBuildLoop(BuildManager.java:253)
        at org.eclipse.core.internal.events.BuildManager.build(BuildManager.java:282)
        at org.eclipse.core.internal.resources.Workspace.build(Workspace.java:211)
        at org.eclipse.ui.internal.ide.dialogs.CleanDialog.doClean(CleanDialog.java:231)
        at org.eclipse.ui.internal.ide.dialogs.CleanDialog$1.runInWorkspace(CleanDialog.java:124)
        at org.eclipse.core.internal.resources.InternalWorkspaceJob.run(InternalWorkspaceJob.java:38)
        at org.eclipse.core.internal.jobs.Worker.run(Worker.java:76)

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