Eclipse fechando sozinho

Bom, utilizo o Ubuntu 13 e de vez em quando meu eclipse está fechando sozinho. Olhando no log percebi a seguinte mensagem:

!ENTRY org.eclipse.osgi 4 0 2013-09-01 15:01:24.387
!MESSAGE Application error
!STACK 1
java.lang.NoClassDefFoundError: Could not initialize class org.eclipse.jface.preference.PreferenceConverter
	at org.eclipse.ui.internal.themes.ThemeElementHelper.installFont(ThemeElementHelper.java:103)
	at org.eclipse.ui.internal.themes.ThemeElementHelper.populateRegistry(ThemeElementHelper.java:59)
	at org.eclipse.ui.internal.Workbench$27.runWithException(Workbench.java:1553)
	at org.eclipse.ui.internal.StartupThreading$StartupRunnable.run(StartupThreading.java:31)
	at org.eclipse.swt.widgets.RunnableLock.run(RunnableLock.java:35)
	at org.eclipse.swt.widgets.Synchronizer.runAsyncMessages(Synchronizer.java:135)
	at org.eclipse.swt.widgets.Display.runAsyncMessages(Display.java:3529)
	at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:3182)
	at org.eclipse.ui.internal.Workbench.runUI(Workbench.java:2523)
	at org.eclipse.ui.internal.Workbench.access$7(Workbench.java:2431)
	at org.eclipse.ui.internal.Workbench$5.run(Workbench.java:586)
	at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:332)
	at org.eclipse.ui.internal.Workbench.createAndRunWorkbench(Workbench.java:543)
	at org.eclipse.ui.PlatformUI.createAndRunWorkbench(PlatformUI.java:149)
	at org.eclipse.ui.internal.ide.application.IDEApplication.start(IDEApplication.java:124)
	at org.eclipse.equinox.internal.app.EclipseAppHandle.run(EclipseAppHandle.java:196)
	at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.runApplication(EclipseAppLauncher.java:110)
	at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.start(EclipseAppLauncher.java:79)
	at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:353)
	at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:180)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.lang.reflect.Method.invoke(Method.java:606)
	at org.eclipse.equinox.launcher.Main.invokeFramework(Main.java:629)
	at org.eclipse.equinox.launcher.Main.basicRun(Main.java:584)
	at org.eclipse.equinox.launcher.Main.run(Main.java:1438)
	at org.eclipse.equinox.launcher.Main.main(Main.java:1414)

!ENTRY org.eclipse.core.jobs 2 2 2013-09-01 15:01:28.858
!MESSAGE Job found still running after platform shutdown.  Jobs should be canceled by the plugin that scheduled them during shutdown: org.eclipse.m2e.core.internal.index.nexus.IndexUpdaterJob

Será que alguém tem alguma dica de como resolver isso ?

Tive o mesmo problema com meu desktop e era problema de memória da máquina, foi trocar que não tive mais problemas.

Provavelmente este não é meu problema por 2 motivos: No windows 7 funciona normal e meu notebook é novo.