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
protected String getChooseButtonText() {
        return PreferencesMessages.WizardPreferencesExportPage1_choose;
    }
    /**
     * @param composite
     * 
     */
    protected void createTransferArea(Composite composite) {
        createTransfersList(composite);
        createDestinationGroup(composite);
        createOptionsGroup(composite);
    }
    /**
     * Answer the string to display in self as the destination type
     * 
     * @return java.lang.String
     */
    protected String getDestinationLabel() {
        return PreferencesMessages.WizardPreferencesExportPage1_file;
    }
    /**
     * @param transfers
     * @return <code>true</code> if the transfer was succesful, and
     *         <code>false</code> otherwise
     */
    protected boolean transfer(IPreferenceFilter[] transfers) {
        File exportFile = new File(getDestinationValue());
        if (!ensureTargetIsValid(exportFile)) {
            return false;
        }