Bug with horizontally scrolled wide grids
With a very wide grid that's limited by a fixed display width that forces a horizontal scroller, the very last column is truncated by a few pixels at its right edge.
I can work around this by adding a fake column heading at the end of the array of header strings (i.e. '... , ""]' will suffice) and adding a CSS for the fake column's width -
Data for the fake column isn't required.
I haven't been able to work out with Firebug why this happens.