当我在项目树中导航（例如打开包等）时，它们总是显示错误消息框：
在“装饰计算”期间发生内部错误。org/eclipse/jdt/internal/debug/ui/MemberActionFilter
这是 /.workspace/.log 中的日志：
!ENTRY org.eclipse.core.jobs 4 2 2013-11-01 17:29:23.513
!MESSAGE An internal error occurred during: "Decoration Calculation".
!STACK 0
java.lang.NoClassDefFoundError: org/eclipse/jdt/internal/debug/ui/MemberActionFilter
at org.eclipse.jdt.internal.debug.ui.ActionFilterAdapterFactory.getAdapter(ActionFilterAdapterFactory.java:42)
at org.eclipse.core.internal.runtime.AdapterManager.getAdapter(AdapterManager.java:295)
at org.eclipse.core.runtime.PlatformObject.getAdapter(PlatformObject.java:66)
at org.eclipse.ui.internal.util.Util.getAdapter(Util.java:110)
at org.eclipse.ui.internal.ActionExpression$ObjectStateExpression.getActionFilter(ActionExpression.java:471)
at org.eclipse.ui.internal.ActionExpression$ObjectStateExpression.preciselyMatches(ActionExpression.java:524)
at org.eclipse.ui.internal.ActionExpression$ObjectStateExpression.isEnabledFor(ActionExpression.java:499)
at org.eclipse.ui.internal.ActionExpression$SingleExpression.isEnabledFor(ActionExpression.java:743)
at org.eclipse.ui.internal.ActionExpression.isEnabledFor(ActionExpression.java:1053)
at org.eclipse.ui.internal.decorators.DecoratorDefinition.isEnabledFor(DecoratorDefinition.java:281)
at org.eclipse.ui.internal.decorators.DecoratorManager.getDecoratorsFor(DecoratorManager.java:382)
at org.eclipse.ui.internal.decorators.LightweightDecoratorManager.getDecoratorsFor(LightweightDecoratorManager.java:315)
at org.eclipse.ui.internal.decorators.LightweightDecoratorManager.getDecorations(LightweightDecoratorManager.java:340)
at org.eclipse.ui.internal.decorators.DecorationScheduler$1.ensureResultCached(DecorationScheduler.java:371)
at org.eclipse.ui.internal.decorators.DecorationScheduler$1.run(DecorationScheduler.java:331)
at org.eclipse.core.internal.jobs.Worker.run(Worker.java:53)
仅供参考，我在 Ubuntu 13.10 64 位上使用 Eclipse for Java EE (Kepler)
对不起我的英语：D