Install the latest JBossIDE 1.5M1 (downloaded from sourceforge) with eclipse included in it.
Create a new workspace. Start Eclipse and try to create a new J2EE 1.4 project. You will get an error dialog stating that <project> does not exist

In the <workspace>/.metadata/.log the following is logged:

!SESSION 2005-07-13 22:18:34.988 -----------------------------------------------
eclipse.buildId=I20050219-1500
java.version=1.5.0_04
java.vendor=Sun Microsystems Inc.
BootLoader constants: OS=linux, ARCH=x86, WS=gtk, NL=en_US
Command-line arguments: -os linux -ws gtk -arch x86

!ENTRY org.eclipse.jdt.ui 4 10001 2005-07-13 22:18:34.989
!MESSAGE Internal Error
!STACK 1
Java Model Exception: Java Model Status [ocalendar does not exist]
at org.eclipse.jdt.internal.core.JavaElement.newNotPresentException(JavaElement.java:467)
at org.eclipse.jdt.internal.core.JavaModelManager.getPerProjectInfoCheckExistence(JavaModelManager.java:941)
at org.eclipse.jdt.internal.core.JavaProject.getPerProjectInfo(JavaProject.java:1779)
at org.eclipse.jdt.internal.core.JavaProject.getRawClasspath(JavaProject.java:1836)
at org.eclipse.jdt.internal.core.JavaProject.getRawClasspath(JavaProject.java:1822)
at org.eclipse.jdt.internal.corext.buildpath.ClasspathModifier.getClasspathEntryFor(ClasspathModifier.java:857)
at org.eclipse.jdt.internal.corext.buildpath.AddToClasspathOperation.isValidProject(AddToClasspathOperation.java:121)
at org.eclipse.jdt.internal.corext.buildpath.AddToClasspathOperation.isValid(AddToClasspathOperation.java:99)
at org.eclipse.jdt.internal.ui.wizards.buildpaths.newsourcepage.ClasspathModifierAction.isValid(ClasspathModifierAction.java:83)
at org.eclipse.jdt.internal.ui.wizards.buildpaths.newsourcepage.DialogPackageExplorerActionGroup.changeEnableState(DialogPackageExplorerActionGroup.java:695)
at org.eclipse.jdt.internal.ui.wizards.buildpaths.newsourcepage.DialogPackageExplorerActionGroup.getAvailableActions(DialogPackageExplorerActionGroup.java:677)
at org.eclipse.jdt.internal.ui.wizards.buildpaths.newsourcepage.DialogPackageExplorerActionGroup.internalSetContext(DialogPackageExplorerActionGroup.java:458)
at org.eclipse.jdt.internal.ui.wizards.buildpaths.newsourcepage.DialogPackageExplorerActionGroup.setContext(DialogPackageExplorerActionGroup.java:430)
at org.eclipse.jdt.internal.ui.wizards.buildpaths.newsourcepage.DialogPackageExplorer.selectionChanged(DialogPackageExplorer.java:489)
at org.eclipse.jface.viewers.Viewer$2.run(Viewer.java:163)
at org.eclipse.core.internal.runtime.InternalPlatform.run(InternalPlatform.java:1015)
at org.eclipse.core.runtime.Platform.run(Platform.java:757)
at org.eclipse.jface.viewers.Viewer.fireSelectionChanged(Viewer.java:161)
at org.eclipse.jface.viewers.StructuredViewer.updateSelection(StructuredViewer.java:1676)
at org.eclipse.jface.viewers.StructuredViewer.setSelection(StructuredViewer.java:1358)
at org.eclipse.jface.viewers.Viewer.setSelection(Viewer.java:380)
at org.eclipse.jdt.internal.ui.wizards.buildpaths.newsourcepage.DialogPackageExplorer.setInput(DialogPackageExplorer.java:401)
at org.eclipse.jdt.internal.ui.wizards.buildpaths.newsourcepage.NewSourceContainerWorkbookPage.init(NewSourceContainerWorkbookPage.java:126)
at org.eclipse.jdt.internal.ui.wizards.buildpaths.BuildPathsBlock.updateUI(BuildPathsBlock.java:370)
at org.eclipse.jdt.internal.ui.wizards.buildpaths.BuildPathsBlock.init(BuildPathsBlock.java:344)
at org.eclipse.jdt.ui.wizards.JavaCapabilityConfigurationPage.init(JavaCapabilityConfigurationPage.java:112)
at org.jboss.ide.eclipse.jdt.ui.wizards.ProjectWizardPage.updateProject(ProjectWizardPage.java:276)
at org.jboss.ide.eclipse.jdt.ui.wizards.ProjectWizardPage$1.run(ProjectWizardPage.java:139)
at org.eclipse.jface.operation.ModalContext.runInCurrentThread(ModalContext.java:344)
at org.eclipse.jface.operation.ModalContext.run(ModalContext.java:289)
at org.eclipse.jface.wizard.WizardDialog.run(WizardDialog.java:824)
at org.jboss.ide.eclipse.jdt.ui.wizards.ProjectWizardPage.changeToNewProject(ProjectWizardPage.java:150)
at org.jboss.ide.eclipse.jdt.ui.wizards.ProjectWizardPage.setVisible(ProjectWizardPage.java:104)
at org.eclipse.jface.wizard.WizardDialog.updateForPage(WizardDialog.java:1024)
at org.eclipse.jface.wizard.WizardDialog.access$2(WizardDialog.java:1007)
at org.eclipse.jface.wizard.WizardDialog$4.run(WizardDialog.java:997)
at org.eclipse.swt.custom.BusyIndicator.showWhile(BusyIndicator.java:69)
at org.eclipse.jface.wizard.WizardDialog.showPage(WizardDialog.java:995)
at org.eclipse.jface.wizard.WizardDialog.nextPressed(WizardDialog.java:747)
at org.eclipse.jface.wizard.WizardDialog.buttonPressed(WizardDialog.java:338)
at org.eclipse.jface.dialogs.Dialog$2.widgetSelected(Dialog.java:543)
at org.eclipse.swt.widgets.TypedListener.handleEvent(TypedListener.java:89)
at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java:82)
at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1009)
at org.eclipse.swt.widgets.Display.runDeferredEvents(Display.java:2728)
at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:2427)
at org.eclipse.jface.window.Window.runEventLoop(Window.java:718)
at org.eclipse.jface.window.Window.open(Window.java:696)
at org.eclipse.ui.actions.NewProjectAction.run(NewProjectAction.java:117)
at org.eclipse.jface.action.Action.runWithEvent(Action.java:1003)
at org.eclipse.jface.action.ActionContributionItem.handleWidgetSelection(ActionContributionItem.java:557)
at org.eclipse.jface.action.ActionContributionItem.access$2(ActionContributionItem.java:507)
at org.eclipse.jface.action.ActionContributionItem$6.handleEvent(ActionContributionItem.java:421)
at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java:82)
at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1009)
at org.eclipse.swt.widgets.Display.runDeferredEvents(Display.java:2728)
at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:2427)
at org.eclipse.ui.internal.Workbench.runEventLoop(Workbench.java:1612)
at org.eclipse.ui.internal.Workbench.runUI(Workbench.java:1578)
at org.eclipse.ui.internal.Workbench.createAndRunWorkbench(Workbench.java:293)
at org.eclipse.ui.PlatformUI.createAndRunWorkbench(PlatformUI.java:144)
at org.eclipse.ui.internal.ide.IDEApplication.run(IDEApplication.java:102)
at org.eclipse.core.internal.runtime.PlatformActivator$1.run(PlatformActivator.java:228)
at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:333)
at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:150)
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:585)
at org.eclipse.core.launcher.Main.invokeFramework(Main.java:268)
at org.eclipse.core.launcher.Main.basicRun(Main.java:260)
at org.eclipse.core.launcher.Main.run(Main.java:887)
at org.eclipse.core.launcher.Main.main(Main.java:871)