Hi, i have google chrome and ext 3.3.1

This bug preview on image



(1) Tree is loaded, all looks fine

(2) Click on first tree node, they have expanded

(3) Collapse first node, but there displays empty white line

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Tree code listed below:

PHP Code:
        this.tree = new Ext.tree.ColumnTree({
            
columns: [...],
            
animatetrue
            
loader: new Ext.tree.TreeLoader(...),
            
enableDDtrue,
            
borderfalse,
            
useArrowstrue,
            
containerScrolltrue,
            
root: new Ext.tree.AsyncTreeNode(...)