I've installed the latest tools. I get an error/dialog box reading "An error has occurred, see error log for more details" if I double click on directories in the package explorer. I get the below stack trace if I try to open a document w/ the XML editor.

Hibernate Tools Version:
hibernate-tools-3.0.0.alpha4.zip

Eclipse Version
Version: 3.1.0
Build id: I20050513-1415

Full stack trace of any exception that occurs:

workspace/.metadata/.log is not being written to anymore.

java.lang.ClassNotFoundException: org.eclipse.wst.xml.ui.internal.provisional.StructuredTextEditorXML
at org.eclipse.osgi.framework.internal.core.BundleLoader.findClass(BundleLoader.java:403)
at org.eclipse.osgi.framework.internal.core.BundleLoader.findClass(BundleLoader.java:350)
at org.eclipse.osgi.framework.adaptor.core.AbstractClassLoader.loadClass(AbstractClassLoader.java:74)
at java.lang.ClassLoader.loadClass(Unknown Source)
at org.eclipse.osgi.framework.internal.core.BundleLoader.loadClass(BundleLoader.java:275)
at org.eclipse.osgi.framework.internal.core.BundleHost.loadClass(BundleHost.java:227)
at org.eclipse.osgi.framework.internal.core.AbstractBundle.loadClass(AbstractBundle.java:1259)
at org.eclipse.core.internal.registry.ConfigurationElement.createExecutableExtension(ConfigurationElement.java:152)
at org.eclipse.core.internal.registry.ConfigurationElement.createExecutableExtension(ConfigurationElement.java:142)
at org.eclipse.core.internal.registry.ConfigurationElement.createExecutableExtension(ConfigurationElement.java:129)
at org.eclipse.core.internal.registry.ConfigurationElementHandle.createExecutableExtension(ConfigurationElementHandle.java:48)
at org.eclipse.ui.internal.WorkbenchPlugin$1.run(WorkbenchPlugin.java:239)
at org.eclipse.swt.custom.BusyIndicator.showWhile(BusyIndicator.java:69)
at org.eclipse.ui.internal.WorkbenchPlugin.createExtension(WorkbenchPlugin.java:235)
at org.eclipse.ui.internal.registry.EditorDescriptor.createEditor(EditorDescriptor.java:252)
at org.eclipse.ui.internal.EditorManager.createPart(EditorManager.java:803)
at org.eclipse.ui.internal.EditorReference.createPartHelper(EditorReference.java:535)
at org.eclipse.ui.internal.EditorReference.createPart(EditorReference.java:357)
at org.eclipse.ui.internal.WorkbenchPartReference.getPart(WorkbenchPartReference.java:559)
at org.eclipse.ui.internal.PartPane.setVisible(PartPane.java:266)
at org.eclipse.ui.internal.presentations.PresentablePart.setVisible(PresentablePart.java:126)
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:391)
at org.eclipse.ui.internal.PartStack.refreshPresentationSelection(PartStack.java:1064)
at org.eclipse.ui.internal.PartStack.setSelection(PartStack.java:1013)
at org.eclipse.ui.internal.PartStack.showPart(PartStack.java:1222)
at org.eclipse.ui.internal.PartStack.add(PartStack.java:406)
at org.eclipse.ui.internal.EditorStack.add(EditorStack.java:109)
at org.eclipse.ui.internal.EditorSashContainer.addEditor(EditorSashContainer.java:60)
at org.eclipse.ui.internal.EditorAreaHelper.addToLayout(EditorAreaHelper.java:212)
at org.eclipse.ui.internal.EditorAreaHelper.addEditor(EditorAreaHelper.java:202)
at org.eclipse.ui.internal.EditorManager.createEditorTab(EditorManager.java:719)
at org.eclipse.ui.internal.EditorManager.openEditorFromDescriptor(EditorManager.java:631)
at org.eclipse.ui.internal.EditorManager.openEditor(EditorManager.java:594)
at org.eclipse.ui.internal.WorkbenchPage.busyOpenEditorBatched(WorkbenchPage.java:2254)
at org.eclipse.ui.internal.WorkbenchPage.busyOpenEditor(WorkbenchPage.java:2185)
at org.eclipse.ui.internal.WorkbenchPage.access$8(WorkbenchPage.java:2177)
at org.eclipse.ui.internal.WorkbenchPage$9.run(WorkbenchPage.java:2163)
at org.eclipse.swt.custom.BusyIndicator.showWhile(BusyIndicator.java:69)
at org.eclipse.ui.internal.WorkbenchPage.openEditor(WorkbenchPage.java:2158)
at org.eclipse.ui.internal.WorkbenchPage.openEditor(WorkbenchPage.java:2140)
at org.eclipse.ui.ide.IDE.openEditor(IDE.java:371)
at org.eclipse.ui.ide.IDE.openEditor(IDE.java:334)
at org.eclipse.jdt.internal.ui.javaeditor.EditorUtility.openInEditor(EditorUtility.java:248)
at org.eclipse.jdt.internal.ui.javaeditor.EditorUtility.openInEditor(EditorUtility.java:128)
at org.eclipse.jdt.internal.ui.actions.OpenActionUtil.open(OpenActionUtil.java:49)
at org.eclipse.jdt.ui.actions.OpenAction.run(OpenAction.java:169)
at org.eclipse.jdt.ui.actions.OpenAction.run(OpenAction.java:153)
at org.eclipse.jdt.ui.actions.SelectionDispatchAction.dispatchRun(SelectionDispatchAction.java:222)
at org.eclipse.jdt.ui.actions.SelectionDispatchAction.run(SelectionDispatchAction.java:198)
at org.eclipse.jdt.internal.ui.packageview.PackageExplorerActionGroup.handleOpen(PackageExplorerActionGroup.java:299)
at org.eclipse.jdt.internal.ui.packageview.PackageExplorerPart$4.open(PackageExplorerPart.java:806)
at org.eclipse.jface.viewers.StructuredViewer$2.run(StructuredViewer.java:741)
at org.eclipse.core.internal.runtime.InternalPlatform.run(InternalPlatform.java:1029)
at org.eclipse.core.runtime.Platform.run(Platform.java:775)
at org.eclipse.ui.internal.JFaceUtil$1.run(JFaceUtil.java:44)
at org.eclipse.jface.util.SafeRunnable.run(SafeRunnable.java:148)
at org.eclipse.jface.viewers.StructuredViewer.fireOpen(StructuredViewer.java:739)
at org.eclipse.jface.viewers.StructuredViewer.handleOpen(StructuredViewer.java:968)
at org.eclipse.jface.viewers.StructuredViewer$6.handleOpen(StructuredViewer.java:1067)
at org.eclipse.jface.util.OpenStrategy.fireOpenEvent(OpenStrategy.java:243)
at org.eclipse.jface.util.OpenStrategy.access$2(OpenStrategy.java:238)
at org.eclipse.jface.util.OpenStrategy$1.handleEvent(OpenStrategy.java:277)
at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java:82)
at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:842)
at org.eclipse.swt.widgets.Display.runDeferredEvents(Display.java:2921)
at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:2554)
at org.eclipse.ui.internal.Workbench.runEventLoop(Workbench.java:1601)
at org.eclipse.ui.internal.Workbench.runUI(Workbench.java:1565)
at org.eclipse.ui.internal.Workbench.createAndRunWorkbench(Workbench.java:315)
at org.eclipse.ui.PlatformUI.createAndRunWorkbench(PlatformUI.java:143)
at org.eclipse.ui.internal.ide.IDEApplication.run(IDEApplication.java:103)
at org.eclipse.core.internal.runtime.PlatformActivator$1.run(PlatformActivator.java:230)
at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:371)
at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:160)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at org.eclipse.core.launcher.Main.invokeFramework(Main.java:330)
at org.eclipse.core.launcher.Main.basicRun(Main.java:274)
at org.eclipse.core.launcher.Main.run(Main.java:977)
at org.eclipse.core.launcher.Main.main(Main.java:952)

I also get the following in a dialog box whenever I try to save a file.

Save Failed:org/eclipse/wst/sse/core/internal/encoding/IResourceCharsetDetector

Hi!
I also have the same problem working with Eclipse 3.1.0 with id I20050627-1435. Someone knows any solution?
The stack starts with:

!MESSAGE org/eclipse/wst/sse/core/internal/encoding/IResourceCharsetDetector
!STACK 0
java.lang.NoClassDefFoundError: org/eclipse/wst/sse/core/internal/encoding/IResourceCharsetDetector
at java.lang.Class.getDeclaredConstructors0(Native Method)

May be

use the latest alpha5 release - not alpha4