Hi,

There is have an bug in resizing locked column.
When i resize locked column, in firebug show me an error:

Tested on FireFox 19.0, IE 10, Google Chrome 25.0.1364.97

Code:
TypeError: Ext.util.CSS.getRule(...) is null
On This Function:

Code:
field.editorMargin = p = Ext.Element.parseBox(Ext.util.CSS.getRule('.' + Ext.baseCSSPrefix + 'grid-cell-inner').style.padding);
LockedColumn.png