Yeah, I checked that out. None of the controls is editable in the last row. I assume it's something I did in my mods of the grid control; I added code to make it size itself properly, to keep the user from tabbing off the end, and to support header-click-sorting.

For now, I just added a row 3 pixels high at the bottom. The grid thinks its the last row, but the user can't see it. This let me get past the problem for the time being.