This is minor issue, but I have always had problems trying to get the ClientSelectColumn checkboxes center justified in their column. I have the following markup for the column:
I thought that it might have to do with some extra padding, so I tried to apply a style that got rid of padding, but that didn't seem to do much. I have to set the column width to at least 40px to get the checkboxes to appear even close to centered. This causes quite a bit of wasted space to the left and right of the checkboxes.