jQuery Grid Plugin - jqGrid

I see some strange behaviour in IE10 when grid size is bigger. When I scroll using horizontal scroll bar to the right of the grid and then scroll up to see the column headers, they are not visible. Attaching screenshots. It happens with the jqgrid demo as well.

Steps to reproduce :

1. Open the jqgrid in IE10 . http://trirand.com/blog/jqgrid.....;-> Frozen Cols Group Header (New) -> Frozen Column

2. Resize the window so that column headers are not visible, if number of columns are less, drag some of the columns to right.

3. Use horizontal scroll bar to scroll to the right.

4. Use vertical scroll bar to move up to see the column headers.

5. You will see that some column headers are not visible. Attached screenshot.

Please advise if you have any solution.

Thank you,