Hi,

I noticed that when you use RowSelectors and Sorting feature in a grid, each time you click in the select all checkbox in the grid header there appears a an error in the browser's debug console.

I don't know if this error has any negative side effets.

infragistics.lob.js:438 Uncaught TypeError: Cannot read property 'replace' of undefined
    at t.(anonymous function).(anonymous function)._handleFocusKb (http://cdn-na.infragistics.com/igniteui/latest/js/infragistics.lob.js:438:9718)
    at t.(anonymous function).(anonymous function)._handleFocusKb (http://code.jquery.com/ui/1.10.3/jquery-ui.min.js:5:5028)
    at HTMLTableCellElement._focusHandler (http://cdn-na.infragistics.com/igniteui/latest/js/infragistics.lob.js:438:6876)
    at HTMLTableElement.dispatch (http://code.jquery.com/jquery-1.9.1.min.js:3:28337)
    at HTMLTableElement.v.handle (http://code.jquery.com/jquery-1.9.1.min.js:3:25042)
    at Object.trigger (http://code.jquery.com/jquery-1.9.1.min.js:3:27423)
    at Object.simulate (http://code.jquery.com/jquery-1.9.1.min.js:3:30815)
    at HTMLDocument.r (http://code.jquery.com/jquery-1.9.1.min.js:4:1788)
_handleFocusKb @ infragistics.lob.js:438
(anonymous) @ jquery-ui.min.js:5
_focusHandler @ infragistics.lob.js:438
dispatch @ jquery-1.9.1.min.js:3
v.handle @ jquery-1.9.1.min.js:3
trigger @ jquery-1.9.1.min.js:3
simulate @ jquery-1.9.1.min.js:3
r @ jquery-1.9.1.min.js:4

Here is a demonstration: http://jsfiddle.net/1uqtf6xf/