using Ext 1.1

have a basic form which displays fine in FireFox (2.0) but not in IE (6). the labels for all fields after my initial columns are gone (they exist if i draw the mouse of the label i see the text). the form is as follows:

Code:
/**
 * New form with buttons alligned to the right
 */
this.form = new Ext.form.Form({
        labelAlign: 'top',
	buttonAlign: 'right'
});
		
/**
 * Field/Column
 */
this.form.column(
       	{width:250}, // precise column sizes or percentages or straight CSS
       	new Ext.form.TextField({
           	fieldLabel: 'Name',
           	name: 'name',
            	width: 240,
		allowBlank: false
       	}),
			
	new Ext.form.ComboBox({
            	fieldLabel: 'Owner',
            	name: 'owner',
            	store: new Ext.data.SimpleStore({
                	fields: ['owner'],
                	data : MATRIX.data.baseElement.owners // from matrix.js
            	}),
            	displayField: 'owner',
		hiddenName: 'owner',
            	typeAhead: true,
            	mode: 'local',
            	triggerAction: 'all',
            	selectOnFocus: true,
            	width: 240,
		forceSelection: true,
		allowBlank: false,
		disabled: true
        	})
    	);
		
/**
 * Field/Column
 */
this.form.column(
       	{width:250, style:'margin-left:25px', clear:true}, // apply custom css, clear:true means it is the last column
        	       	
       	new Ext.form.ComboBox({
            	fieldLabel: 'Category',
            	name: 'category',
            	store: new Ext.data.SimpleStore({
                	fields: ['category'],
                	data : MATRIX.data.environment.categories
            	}),
            	displayField: 'category',
		hiddenName: 'category',
            	typeAhead: true,
            	mode: 'local',
            	triggerAction: 'all',
            	selectOnFocus: true,
            	width: 240,
		forceSelection: true,
		allowBlank: false
       	}),

       	new Ext.form.ComboBox({
            	fieldLabel: 'Availability',
            	name: 'availability',
            	store: new Ext.data.SimpleStore({
                	fields: ['availability'],
                	data : MATRIX.data.baseElement.effects // from matrix.js
            	}),
            	displayField: 'availability',
		hiddenName: 'availability',
            	typeAhead: true,
            	mode: 'local',
            	triggerAction: 'all',
            	selectOnFocus: true,
            	width: 240,
		forceSelection: true,
		allowBlank: false
       	})
    );
		
/**
 * Field/Column
 */
this.form.add(
	new Ext.form.TextArea({
            	fieldLabel: 'Description',
            	name: 'description',
            	width: 515,
            	maxLength: 200,
            	grow: true,
            	preventScrollbars: true
       	})
);

/** submit/cancel buttons */

this.form.render(
       this.panel.getEl().child("div.matrix-form")
);
if i click on the TextArea the associated box shrinks the form maybe 2/3 pixels and when clicking outside the form returns to its original size. little hard to debug in IE.

ideas?