Bug 97523 [Import/Export] Get overwrite prompt before no resources selected prompt
3.1 RC1 - File > Export > Archive - clear any selected resources - enter an archive file name where the file already exists - Finish - it prompts to overwrite the file; choose Yes - it says "There are no resources currently selected for export" (OK) Should get the "no resources" prompt first, and not bother with the second one. Should check the other export wizards too.
bundles/org.eclipse.ui.ide/extensions/org/eclipse/ui/dialogs/WizardExportResourcesPage.java
private ResourceTreeAndListGroup resourceGroup;
    private final static String SELECT_TYPES_TITLE = IDEWorkbenchMessages.WizardTransferPage_selectTypes;
    private final static String SELECT_ALL_TITLE = IDEWorkbenchMessages.WizardTransferPage_selectAll;
    private final static String DESELECT_ALL_TITLE = IDEWorkbenchMessages.WizardTransferPage_deselectAll;
    /**
     * Creates an export wizard page. If the current resource selection 
     * is not empty then it will be used as the initial collection of resources
     * selected for export.
     *
     * @param pageName the name of the page
     * @param selection the current resource selection
     */
    protected WizardExportResourcesPage(String pageName,
            IStructuredSelection selection) {
        super(pageName);
        this.initialResourceSelection = selection;
    }
    /**
     * The <code>addToHierarchyToCheckedStore</code> implementation of this 
     * <code>WizardDataTransferPage</code> method returns <code>false</code>. 
     * Subclasses may override this method.
     */
    protected boolean allowNewContainerName() {
        return false;
    }
    /**
     * Creates a new button with the given id.
     * <p>
     * The <code>Dialog</code> implementation of this framework method
     * creates a standard push button, registers for selection events