After dragging a column from a flat grid view to GroupBy bar and using the mouse wheel to scroll c***the grid to shrink, ultimately resulting in a java script error. Just in case it is relevant, the grid uses fixed headers, no footer, no edit, width 100%, one column (not the first or last) has 100%. The other columns have a fixed size, no row indicator and IE6. On the other hand, a hierarchical view functions as expected in this respect. Is there a work around?