diff --git a/bundles/org.eclipse.ui.ide/src/org/eclipse/ui/ide/undo/AbstractWorkspaceOperation.java b/bundles/org.eclipse.ui.ide/src/org/eclipse/ui/ide/undo/AbstractWorkspaceOperation.java
index 34f9d6c..1436c4c 100644
--- a/bundles/org.eclipse.ui.ide/src/org/eclipse/ui/ide/undo/AbstractWorkspaceOperation.java
+++ b/bundles/org.eclipse.ui.ide/src/org/eclipse/ui/ide/undo/AbstractWorkspaceOperation.java
@@ -32,7 +32,6 @@
 import org.eclipse.core.runtime.Status;
 import org.eclipse.core.runtime.jobs.ISchedulingRule;
 import org.eclipse.jface.action.Action;
-import org.eclipse.jface.dialogs.ErrorDialog;
 import org.eclipse.osgi.util.NLS;
 import org.eclipse.swt.widgets.Shell;
 import org.eclipse.ui.PlatformUI;
@@ -44,8 +43,9 @@
  * An AbstractWorkspaceOperation represents an undoable operation that affects
  * the workspace. It handles common workspace operation activities such as
  * tracking which resources are affected by an operation, prompting the user
- * when there are possible side effects of operations, error handling for core
- * exceptions, etc. Clients may call the public API from a background thread.
+ * when there are possible side effects of operations, building execution
+ * exceptions from core exceptions, etc. Clients may call the public API from a
+ * background thread.
  * 
  * This class is not intended to be subclassed by clients.
  * 
@@ -182,9 +182,8 @@
 	/**
 	 * Execute the specified operation. This implementation executes the
 	 * operation in a workspace runnable and catches any CoreExceptions
-	 * resulting from the operation. An error dialog is shown to the user if a
-	 * CoreException occurs and the exception is propagated as an
-	 * ExecutionException if specified by the core exception handler
+	 * resulting from the operation. Unhandled CoreExceptions are propagated as
+	 * ExecutionExceptions.
 	 * 
 	 * @param monitor
 	 *            the progress monitor to use for the operation
@@ -213,27 +212,9 @@
 				}
 			}, getExecuteSchedulingRule(), IWorkspace.AVOID_UPDATE, null);
 		} catch (final CoreException e) {
-			final boolean[] propagateException = new boolean[1];
-			getShell(uiInfo).getDisplay().syncExec(new Runnable() {
-				public void run() {
-					propagateException[0] = handleCoreException(
-							e,
-							getShell(uiInfo),
-							NLS
-									.bind(
-											UndoMessages.AbstractWorkspaceOperation_ExecuteErrorTitle,
-											getLabel()));
-
-				}
-
-			});
-			if (propagateException[0]) {
-				throw new ExecutionException(
-						NLS
-								.bind(
-										UndoMessages.AbstractWorkspaceOperation_ExecuteErrorTitle,
-										getLabel()), e);
-			}
+			throw new ExecutionException(NLS.bind(
+					UndoMessages.AbstractWorkspaceOperation_ExecuteErrorTitle,
+					getLabel()), e);
 		}
 		isValid = true;
 		return Status.OK_STATUS;
@@ -242,9 +223,8 @@
 	/**
 	 * Redo the specified operation. This implementation redoes the operation in
 	 * a workspace runnable and catches any CoreExceptions resulting from the
-	 * operation. An error dialog is shown to the user if a CoreException occurs
-	 * and the exception is propagated as an ExecutionException if specified by
-	 * the core exception handler.
+	 * operation. Unhandled CoreExceptions are propagated as
+	 * ExecutionExceptions.
 	 * 
 	 * @param monitor
 	 *            the progress monitor to use for the operation
@@ -272,24 +252,10 @@
 				}
 			}, getRedoSchedulingRule(), IWorkspace.AVOID_UPDATE, null);
 		} catch (final CoreException e) {
-			final boolean[] propagateException = new boolean[1];
-			getShell(uiInfo).getDisplay().syncExec(new Runnable() {
-				public void run() {
-					propagateException[0] = handleCoreException(
-							e,
-							getShell(uiInfo),
-							NLS
-									.bind(
-											UndoMessages.AbstractWorkspaceOperation_RedoErrorTitle,
-											getLabel()));
-				}
+			throw new ExecutionException(NLS.bind(
+					UndoMessages.AbstractWorkspaceOperation_RedoErrorTitle,
+					getLabel()), e);
 
-			});
-			if (propagateException[0]) {
-				throw new ExecutionException(NLS.bind(
-						UndoMessages.AbstractWorkspaceOperation_RedoErrorTitle,
-						getLabel()), e);
-			}
 		}
 		isValid = true;
 		return Status.OK_STATUS;
@@ -298,9 +264,8 @@
 	/**
 	 * Undo the specified operation. This implementation undoes the operation in
 	 * a workspace runnable and catches any CoreExceptions resulting from the
-	 * operation. An error dialog is shown to the user if a CoreException occurs
-	 * and the exception is propagated as an ExecutionException if specified by
-	 * the core exception handler.
+	 * operation. Unhandled CoreExceptions are propagated as
+	 * ExecutionExceptions.
 	 * 
 	 * @param monitor
 	 *            the progress monitor to use for the operation
@@ -328,25 +293,10 @@
 				}
 			}, getUndoSchedulingRule(), IWorkspace.AVOID_UPDATE, null);
 		} catch (final CoreException e) {
-			final boolean[] propagateException = new boolean[1];
-			getShell(uiInfo).getDisplay().syncExec(new Runnable() {
-				public void run() {
-					propagateException[0] = handleCoreException(
-							e,
-							getShell(uiInfo),
-							NLS
-									.bind(
-											UndoMessages.AbstractWorkspaceOperation_UndoErrorTitle,
-											getLabel()));
+			throw new ExecutionException(NLS.bind(
+					UndoMessages.AbstractWorkspaceOperation_UndoErrorTitle,
+					getLabel()), e);
 
-				}
-
-			});
-			if (propagateException[0]) {
-				throw new ExecutionException(NLS.bind(
-						UndoMessages.AbstractWorkspaceOperation_UndoErrorTitle,
-						getLabel()), e);
-			}
 		}
 		isValid = true;
 		return Status.OK_STATUS;
@@ -705,49 +655,6 @@
 	}
 
 	/**
-	 * Handle the core exception that occurred while trying to execute, undo, or
-	 * redo the operation, returning a boolean to indicate whether this
-	 * exception should cause a {@link ExecutionException} to be thrown.
-	 * 
-	 * It is safe to access UI in this method. The default implementation is to
-	 * show an error dialog, but subclasses may override this method to swallow
-	 * certain exceptions or handle them differently.
-	 * 
-	 * If the only difference in handling the exception is to show a different
-	 * error message, subclasses should override
-	 * {@link #getErrorMessage(CoreException)} instead.
-	 * 
-	 * @param e
-	 *            the CoreException
-	 * @param shell
-	 *            the shell to be used for showing any UI information
-	 * @param errorTitle
-	 *            the title to be used in the error dialog.
-	 * @return a boolean indicating whether this exception should be propagated
-	 *         to the caller as an ExecutionException
-	 */
-	protected boolean handleCoreException(CoreException e, Shell shell,
-			String errorTitle) {
-		ErrorDialog.openError(shell, errorTitle, getErrorMessage(e), e
-				.getStatus());
-		return true;
-	}
-
-	/**
-	 * Return the specific error message to use when the specified core
-	 * exception occurs, or <code>null</code> to indicate that the the
-	 * exception's message should be used.
-	 * 
-	 * @param e
-	 *            the CoreException
-	 * @return the string to be used in any shown error message, or
-	 *         <code>null</code> if the exception's message should be shown.
-	 */
-	protected String getErrorMessage(CoreException e) {
-		return null;
-	}
-
-	/**
 	 * Return a scheduling rule appropriate for executing this operation.
 	 * 
 	 * The default implementation is to return a rule that locks out the entire
diff --git a/bundles/org.eclipse.ui.ide/src/org/eclipse/ui/ide/undo/CreateProjectOperation.java b/bundles/org.eclipse.ui.ide/src/org/eclipse/ui/ide/undo/CreateProjectOperation.java
index 313f1b1..d29c294 100644
--- a/bundles/org.eclipse.ui.ide/src/org/eclipse/ui/ide/undo/CreateProjectOperation.java
+++ b/bundles/org.eclipse.ui.ide/src/org/eclipse/ui/ide/undo/CreateProjectOperation.java
@@ -12,11 +12,7 @@
 package org.eclipse.ui.ide.undo;
 
 import org.eclipse.core.resources.IProjectDescription;
-import org.eclipse.core.resources.IResourceStatus;
-import org.eclipse.core.runtime.CoreException;
-import org.eclipse.osgi.util.NLS;
 import org.eclipse.ui.internal.ide.undo.ProjectDescription;
-import org.eclipse.ui.internal.ide.undo.UndoMessages;
 
 /**
  * A CreateProjectOperation represents an undoable operation for creating a
@@ -48,26 +44,4 @@
 		super(new ProjectDescription[] { new ProjectDescription(
 				projectDescription) }, label);
 	}
-
-	/*
-	 * (non-Javadoc)
-	 * 
-	 * Overridden to return a specific error message for the existence of a case
-	 * variant of a project.
-	 * 
-	 * @see org.eclipse.ui.ide.undo.AbstractWorkspaceOperation#getErrorMessage(org.eclipse.core.runtime.CoreException)
-	 */
-	protected String getErrorMessage(CoreException e) {
-		if (e.getStatus().getCode() == IResourceStatus.CASE_VARIANT_EXISTS) {
-			if (resourceDescriptions != null
-					&& resourceDescriptions.length == 1) {
-				ProjectDescription project = (ProjectDescription) resourceDescriptions[0];
-				return NLS
-						.bind(
-								UndoMessages.CreateProjectOperation_caseVariantExistsError,
-								project.getName());
-			}
-		}
-		return super.getErrorMessage(e);
-	}
 }
diff --git a/bundles/org.eclipse.ui.ide/src/org/eclipse/ui/internal/ide/undo/UndoMessages.java b/bundles/org.eclipse.ui.ide/src/org/eclipse/ui/internal/ide/undo/UndoMessages.java
index abe9672..2bbe60e 100644
--- a/bundles/org.eclipse.ui.ide/src/org/eclipse/ui/internal/ide/undo/UndoMessages.java
+++ b/bundles/org.eclipse.ui.ide/src/org/eclipse/ui/internal/ide/undo/UndoMessages.java
@@ -59,7 +59,6 @@
 	public static String AbstractCopyOrMoveResourcesOperation_moveProjectProgress;
 	
 	public static String DeleteResourcesOperation_DeletingProjectContentWarning;
-	public static String CreateProjectOperation_caseVariantExistsError;
 	
 	public static String ProjectDescription_NewProjectProgress;
 	public static String FileDescription_NewFileProgress;
diff --git a/bundles/org.eclipse.ui.ide/src/org/eclipse/ui/internal/ide/undo/messages.properties b/bundles/org.eclipse.ui.ide/src/org/eclipse/ui/internal/ide/undo/messages.properties
index 7ac3f01..93fd375 100644
--- a/bundles/org.eclipse.ui.ide/src/org/eclipse/ui/internal/ide/undo/messages.properties
+++ b/bundles/org.eclipse.ui.ide/src/org/eclipse/ui/internal/ide/undo/messages.properties
@@ -43,8 +43,6 @@
 
 DeleteResourcesOperation_DeletingProjectContentWarning=Deleting project content will erase all of the file and folder history for the project.  Undo will not restore the content.
 
-CreateProjectOperation_caseVariantExistsError = The underlying file system is case insensitive. There is an existing project which conflicts with ''{0}''.
-
 MoveProjectOperation_Progress = Moving project...
 
 ProjectDescription_NewProjectProgress=Creating new project...