When starting Eclipse 3.4M4 with Aptana and RadRails 0.9.3 installed, the Ruby Explorer view opens with the following stack trace: java.lang.NoClassDefFoundError: org/eclipse/search/internal/ui/text/ResourceTransferDragAdapter at org.rubypeople.rdt.internal.ui.packageview.PackageExplorerPart.initDrag(PackageExplorerPart.java:927) at org.rubypeople.rdt.internal.ui.packageview.PackageExplorerPart.initDragAndDrop(PackageExplorerPart.java:915) at org.rubypeople.rdt.internal.ui.packageview.PackageExplorerPart.createPartControl(PackageExplorerPart.java:595) at org.eclipse.ui.internal.ViewReference.createPartHelper(ViewReference.java:371) at org.eclipse.ui.internal.ViewReference.createPart(ViewReference.java:230) at org.eclipse.ui.internal.WorkbenchPartReference.getPart(WorkbenchPartReference.java:594) at org.eclipse.ui.internal.PartPane.setVisible(PartPane.java:300) at org.eclipse.ui.internal.ViewPane.setVisible(ViewPane.java:531) at org.eclipse.ui.internal.presentations.PresentablePart.setVisible(PresentablePart.java:180) at org.eclipse.ui.internal.presentations.util.PresentablePartFolder.select(PresentablePartFolder.java:270) at org.eclipse.ui.internal.presentations.util.LeftToRightTabOrder.select(LeftToRightTabOrder.java:65) at org.eclipse.ui.internal.presentations.util.TabbedStackPresentation.selectPart(TabbedStackPresentation.java:473) at org.eclipse.ui.internal.PartStack.refreshPresentationSelection(PartStack.java:1256) at org.eclipse.ui.internal.PartStack.setSelection(PartStack.java:1209) at org.eclipse.ui.internal.PartStack.showPart(PartStack.java:1604) at org.eclipse.ui.internal.PartStack.createControl(PartStack.java:649) at org.eclipse.ui.internal.PartStack.createControl(PartStack.java:576) at org.eclipse.ui.internal.PartSashContainer.createControl(PartSashContainer.java:564) at org.eclipse.ui.internal.PerspectiveHelper.activate(PerspectiveHelper.java:270) at org.eclipse.ui.internal.Perspective.onActivate(Perspective.java:931) at org.eclipse.ui.internal.WorkbenchPage.setPerspective(WorkbenchPage.java:3461) at org.eclipse.ui.internal.WorkbenchPage.busyResetPerspective(WorkbenchPage.java:924) at org.eclipse.ui.internal.WorkbenchPage.access$14(WorkbenchPage.java:860) at org.eclipse.ui.internal.WorkbenchPage$13.run(WorkbenchPage.java:2944) at org.eclipse.swt.custom.BusyIndicator.showWhile(BusyIndicator.java:67) at org.eclipse.ui.internal.WorkbenchPage.resetPerspective(WorkbenchPage.java:2942) at org.eclipse.ui.internal.ResetPerspectiveAction.run(ResetPerspectiveAction.java:58) at org.eclipse.ui.internal.PerspectiveAction.run(PerspectiveAction.java:70) at org.eclipse.ui.internal.PerspectiveSwitcher$13.widgetSelected(PerspectiveSwitcher.java:1153) at org.eclipse.swt.widgets.TypedListener.handleEvent(TypedListener.java:227) at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java:66) at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1113) at org.eclipse.swt.widgets.Display.runDeferredEvents(Display.java:3335) at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:2982) at org.eclipse.ui.internal.Workbench.runEventLoop(Workbench.java:2381) at org.eclipse.ui.internal.Workbench.runUI(Workbench.java:2345) at org.eclipse.ui.internal.Workbench.access$4(Workbench.java:2211) at org.eclipse.ui.internal.Workbench$4.run(Workbench.java:473) at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:288) at org.eclipse.ui.internal.Workbench.createAndRunWorkbench(Workbench.java:468) at org.eclipse.ui.PlatformUI.createAndRunWorkbench(PlatformUI.java:149) at org.eclipse.ui.internal.ide.application.IDEApplication.start(IDEApplication.java:106) at org.eclipse.equinox.internal.app.EclipseAppHandle.run(EclipseAppHandle.java:193) at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.runApplication(EclipseAppLauncher.java:106) at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.start(EclipseAppLauncher.java:76) at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:362) at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:175) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) at java.lang.reflect.Method.invoke(Method.java:597) at org.eclipse.equinox.launcher.Main.invokeFramework(Main.java:561) at org.eclipse.equinox.launcher.Main.basicRun(Main.java:501) at org.eclipse.equinox.launcher.Main.run(Main.java:1239)