I just upgraded to 2016.1.112 and I noticed that the grids now have a grey gradient background color over rows that are hovered over. The grid did not used to do this in 2015.3.1111. You can change the target version in the following example to demonstrate:
Also, the hover background color of the grid does not follow the hover background color for any other widget and does not seem to be controlled by the same hover background color variable in the styles. This is evident when you change the "Hover background" color in the theme builder and all widgets have the new hover background color except for the grid:
How can I either remove the hover background color on grids or change the color to match all other widgets?