I found that it still does not work even for Eclipse 3.2 final release (aka Callisto). This seems like show stopped for me now!

It says:
Unable to create view: class org.mevenide.ui.eclipse.sync.action.ToggleWritePropertiesAction overrides final method [Æà*(+.ká*(+9

And yields the following stack trace:
java.lang.VerifyError: class org.mevenide.ui.eclipse.sync.action.ToggleWritePropertiesAction overrides final method [Æà*(+.ká*(+9
at java.lang.ClassLoader.defineClass1(Native Method)
at java.lang.ClassLoader.defineClass(ClassLoader.java:620)
at org.eclipse.osgi.internal.baseadaptor.DefaultClassLoader.defineClass(DefaultClassLoader.java:160)
at org.eclipse.osgi.baseadaptor.loader.ClasspathManager.defineClass(ClasspathManager.java:498)
at org.eclipse.osgi.baseadaptor.loader.ClasspathManager.findClassImpl(ClasspathManager.java:468)
at org.eclipse.osgi.baseadaptor.loader.ClasspathManager.findLocalClassImpl(ClasspathManager.java:427)
at org.eclipse.osgi.baseadaptor.loader.ClasspathManager.findLocalClass(ClasspathManager.java:410)
at org.eclipse.osgi.internal.baseadaptor.DefaultClassLoader.findLocalClass(DefaultClassLoader.java:188)
at org.eclipse.osgi.framework.internal.core.BundleLoader.findLocalClass(BundleLoader.java:339)
at org.eclipse.osgi.framework.internal.core.BundleLoader.findClass(BundleLoader.java:391)
at org.eclipse.osgi.framework.internal.core.BundleLoader.findClass(BundleLoader.java:352)
at org.eclipse.osgi.internal.baseadaptor.DefaultClassLoader.loadClass(DefaultClassLoader.java:83)
at java.lang.ClassLoader.loadClass(ClassLoader.java:251)
at java.lang.ClassLoader.loadClassInternal(ClassLoader.java:319)
at org.mevenide.ui.eclipse.sync.view.SynchronizationView.createActions(SynchronizationView.java:352)
at org.mevenide.ui.eclipse.sync.view.SynchronizationView.createPartControl(SynchronizationView.java:164)
at org.eclipse.ui.internal.ViewReference.createPartHelper(ViewReference.java:332)
at org.eclipse.ui.internal.ViewReference.createPart(ViewReference.java:197)
at org.eclipse.ui.internal.WorkbenchPartReference.getPart(WorkbenchPartReference.java:566)
at org.eclipse.ui.internal.PartPane.setVisible(PartPane.java:290)
at org.eclipse.ui.internal.ViewPane.setVisible(ViewPane.java:525)
at org.eclipse.ui.internal.presentations.PresentablePart.setVisible(PresentablePart.java:140)
at org.eclipse.ui.internal.presentations.util.PresentablePartFolder.select(PresentablePartFolder.java:268)
at org.eclipse.ui.internal.presentations.util.LeftToRightTabOrder.select(LeftToRightTabOrder.java:65)
at org.eclipse.ui.internal.presentations.util.TabbedStackPresentation.selectPart(TabbedStackPresentation.java:394)
at org.eclipse.ui.internal.PartStack.refreshPresentationSelection(PartStack.java:1144)
at org.eclipse.ui.internal.PartStack.setSelection(PartStack.java:1097)
at org.eclipse.ui.internal.PartStack.presentationSelectionChanged(PartStack.java:795)
at org.eclipse.ui.internal.PartStack.access$1(PartStack.java:781)
at org.eclipse.ui.internal.PartStack$1.selectPart(PartStack.java:123)
at org.eclipse.ui.internal.presentations.util.TabbedStackPresentation$1.handleEvent(TabbedStackPresentation.java:126)
at org.eclipse.ui.internal.presentations.util.AbstractTabFolder.fireEvent(AbstractTabFolder.java:267)
at org.eclipse.ui.internal.presentations.util.AbstractTabFolder.fireEvent(AbstractTabFolder.java:276)
at org.eclipse.ui.internal.presentations.defaultpresentation.DefaultTabFolder.access$1(DefaultTabFolder.java:1)
at org.eclipse.ui.internal.presentations.defaultpresentation.DefaultTabFolder$2.handleEvent(DefaultTabFolder.java:84)
at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java:66)
at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:928)
at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:952)
at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:937)
at org.eclipse.swt.widgets.Widget.notifyListeners(Widget.java:709)
at org.eclipse.swt.custom.CTabFolder.setSelection(CTabFolder.java:3171)
at org.eclipse.swt.custom.CTabFolder.onMouse(CTabFolder.java:1953)
at org.eclipse.swt.custom.CTabFolder$1.handleEvent(CTabFolder.java:288)
at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java:66)
at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:928)
at org.eclipse.swt.widgets.Display.runDeferredEvents(Display.java:3348)
at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:2968)
at org.eclipse.ui.internal.Workbench.runEventLoop(Workbench.java:1914)
at org.eclipse.ui.internal.Workbench.runUI(Workbench.java:1878)
at org.eclipse.ui.internal.Workbench.createAndRunWorkbench(Workbench.java:419)
at org.eclipse.ui.PlatformUI.createAndRunWorkbench(PlatformUI.java:149)
at org.eclipse.ui.internal.ide.IDEApplication.run(IDEApplication.java:95)
at org.eclipse.core.internal.runtime.PlatformActivator$1.run(PlatformActivator.java:78)
at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.runApplication(EclipseAppLauncher.java:92)
at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.start(EclipseAppLauncher.java:68)
at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:400)
at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:177)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)

Here is the reimplemented class.

package org.mevenide.ui.eclipse.sync.action;

import org.eclipse.jface.action.Action;
import org.eclipse.jface.util.IPropertyChangeListener;
import org.eclipse.jface.util.PropertyChangeEvent;

public class ToggleWritePropertiesAction extends Action {

public ToggleWritePropertiesAction()
{
super(null, 2);
IPropertyChangeListener listener =
new IPropertyChangeListener() {

public void propertyChange(PropertyChangeEvent event) {
if("checked".equals(event.getProperty()))
{
String tooltip;
if(((Boolean)event.getNewValue()).booleanValue())
{ tooltip = "Donot override project.properties"; // beacause I don have the whole project I dont need the dependecy // but if any one want do compile the right way he should yuse theline below //Mevenide.getResourceString("ToggleWriteProperties.NoOverride"); } else

setToolTipText(tooltip);
}
}
};
addPropertyChangeListener(listener);
}

}