Hi,

The ItemSelector UX plugin in combination with the anchor layout seems to work differently. Without a height set in the code below, it won't be displayed, which however was the case with ExtJS 4.0.7. Setting the height will display the item selector as expected.

Regards,
Markus

Code:
Ext.onReady(function(){
    var ds = Ext.create('Ext.data.ArrayStore', {
        data: [[123,'One Hundred Twenty Three'],
            ['1', 'One'], ['2', 'Two'], ['3', 'Three'], ['4', 'Four'], ['5', 'Five'],
            ['6', 'Six'], ['7', 'Seven'], ['8', 'Eight'], ['9', 'Nine']],
        fields: ['value','text'],
        sortInfo: {
            field: 'value',
            direction: 'ASC'
        }
    });


    /*
     * Ext.ux.form.ItemSelector Example Code
     */
    var isForm = Ext.widget('form', {
        title: 'ItemSelector Test',
        width: 700,
        bodyPadding: 10,
        height: 600,
        renderTo: Ext.getBody(),
        layout: 'fit',
            items: [{
                xtype: 'fieldset',
                itemId: 'fieldset',
                defaultType: 'textfield',
                padding: 5,
                defaults: {
                    anchor: '100%',
                    labelWidth: 140
                },
                items: [{
                    fieldLabel: "F1"
                },
                {
                    fieldLabel: "F2"
                },
                {
                    fieldLabel: "F3"
                },
                {
                    xtype: 'numberfield',
                    fieldLabel: "F4",
                    minValue: 0
                },
                {
                    xtype: 'numberfield',
                    fieldLabel: "F5",
                    minValue: 0
                },
                {
                    xtype: 'itemselector',
                    itemId: 'managers',
                    valueField: 'value',
                    //height: 300,
                    displayField: 'text',
                    store: ds,
                    buttons: ['add', 'remove']
                }]
            }],
            buttons: [
            {
                text: "B1"
            },
            {
                text: "B2"
            }]
    });
});
Code:
<!DOCTYPE html>
<html>
<head>
    <!-- ExtJS -->
    <link rel="stylesheet" type="text/css" href="../../resources/css/ext-all.css" />
    <script type="text/javascript" src="../../ext-all.js"></script>


    <!-- Example -->
    <script type="text/javascript" src="../ux/form/MultiSelect.js"></script>
    <script type="text/javascript" src="../ux/form/ItemSelector.js"></script>
    <script type="text/javascript" src="multiselect-demo.js"></script>
    <link rel="stylesheet" type="text/css" href="../ux/css/ItemSelector.css" />
</head>
<body>
</body>
</html>