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/WizardPreferencesPage.java
createTransferArea(composite);
        restoreWidgetValues();
        
        setPageComplete();
        setPreferenceTransfers();
        setControl(composite);
        giveFocusToDestination();
    }
    /**
     * @param composite
     */
    protected abstract void createTransferArea(Composite composite);
    protected final boolean validateDestinationGroup() {
        File file = new File(getDestinationValue());
        if (file.getPath().length() <= 0 || file.isDirectory()) {
            setMessage(PreferencesMessages.WizardPreferencesExportPage1_noPrefFile);
            return false;
        }
        return true;
    }
    /**
     * 
     */
    protected void setPreferenceTransfers() {
        PreferenceTransferElement[] transfers = getTransfers();
        transfersTable.removeAll();
        for (int i = 0; i < transfers.length; i++) {
            PreferenceTransferElement element = transfers[i];
            createItem(element, transfersTable);
        }