[2.2] Form FieldSet anchor problems

[letssurf]

I'm hoping that someone could help me out here.

I'm trying to use anchor inside a form fieldset. I had it working on a form, but when I but items inside a fieldset it's gone a bit odd.

Basicly what happens is the textfield resizes to match the resized window, but when the window is shrunk it stays at it's larger size. What am I missing here?

var testForm = new Ext.form.FormPanel({
    title: 'Test Form',
    labelWidth: 50,
    bodyStyle: 'padding:5px',
    border: false,
    frame: true,
    items: [{
        xtype: 'fieldset',
        title: 'test',
        autoHeight: true,
        items: [{
            xtype: 'textfield',
            fieldLabel: 'To',
            name: 'f_to',
            value: 'foo@bar.com',
            anchor: '-15'
        }]
    }]
});

var win = new Ext.Window({
    width: 560,
    height: 400,
    minWidth: 300,
    minHeight: 200,
    plain: true,
    title: 'Test Window',
    layout: 'fit',
    border: false,
    closable: false,
    items: testForm
});
win.show();

[seahigh]

I experienced the same problem.
any news on official fix for this?