Ext.LoadMask() and dom.firstChild error in IE

[LuWa]

    var cm = new Ext.grid.ColumnModel([{
           header: 'Vorname',
           dataIndex: 'vorname',
           width: 150,
           sortable: true,
           editor: new Ext.grid.GridEditor(new Ext.form.TextField({
               allowBlank: true,
               inputType: 'text'
           }))
        }, {
           header: 'Nachname',
           dataIndex: 'nachname',
           width: 150,
           sortable: true,
           editor: new Ext.grid.GridEditor(new Ext.form.TextField({
               allowBlank: true,
               inputType: 'text'
           }))
        }, {
           header: 'Firmenname',
           dataIndex: 'firmenname',
           width: 200,
           sortable: true,
           editor: new Ext.grid.GridEditor(new Ext.form.TextField({
               allowBlank: true,
               inputType: 'text'
           }))
        }, {
            dataIndex: 'options',
            width: 65,
            sortable: false,
            resizable: false,
            editable: false
        }]);

    var grid = new Ext.grid.EditorGrid('topic-grid', {
        ds: AddressDatastore,
        cm: cm,
        loadMask: true,
        selModel: new Ext.grid.RowSelectionModel({singleSelect: false}),
        enableColLock: false,
        enableDragDrop: true
    });

        // Header-Toolbar
    var tb = new Ext.Toolbar(grid.getView().getHeaderPanel(true));

    tb.add({
        icon: 'images/add.gif',
        text: 'Adresse hinzufügen',
        cls: 'x-btn-text-icon',
        handler: function() {
            addAddress();
        }
    }, {
        icon: 'images/csv_import.gif',
        text: 'CSV importieren',
        cls: 'x-btn-text-icon',
        handler: function() {
            csvAddressImport();
        }
    }, {
        icon: 'images/csv_export.gif',
        text: 'CSV exportieren',
        cls: 'x-btn-text-icon',
        handler: function() {
            csvAddressExport();
        }
    }); 

I have the following problem:
When i change the Grid my Toolbar can't be displayed again.

[brian.moeskau]

To clarify, if someone can post a working test case that we can drop in and run, I'll look into it. We have too many threads to respond to to try and build our own test cases from scratch for everything people post. If you can please help us out by providing something we can work with, we'll take a look.

[cousin_itt]

I've bumped into this one too.
I'll post a test case when I've recovered from Monday's hefty deadline.

Adding the following to ext-all-debug.js just inside the destroy function of the Ext.LoadMask.prototype fixes the problem for me:

this.el._mask = '';
this.el._maskMsg = ''; 

A more elegant fix :

ds.on('beforeload', function() {
 if(this.loadMask) {
   this.loadMask.el._mask = '';
   this.loadMask.el._maskMsg = '';
 }
},grid); 

Hope this helps.
Cheers.