Bug 85506 [Import/Export] [Preferences] import preference wizard uses a "save" dialog.
I20050215-2300 The import preferences wizard provides a browse button to select the file you wish to import from. However, it creates a Save As dialog. When you select the file you wish to import you are greeted with a warning that the file will be overwritten. No such thing occurrs, and otherwise the import succeeds.
bundles/org.eclipse.ui.ide/src/org/eclipse/ui/internal/wizards/preferences/WizardPreferencesExportPage1.java
implements Listener {
    
    private static final String PREFERENCESEXPORTPAGE1 = "preferencesExportPage1"; 
    /**
     * Create an instance of this class
     */
    protected WizardPreferencesExportPage1(String name) {
        super(name);
        setTitle(PreferencesMessages.WizardPreferencesExportPage1_exportTitle);
        setDescription(PreferencesMessages.WizardPreferencesExportPage1_exportDescription);
    }
    /**
     * Create an instance of this class
     * 
     */
    public WizardPreferencesExportPage1() {
        this(PREFERENCESEXPORTPAGE1);
    }
    protected String getAllButtonText() {
        return PreferencesMessages.WizardPreferencesExportPage1_all;
    }