inconsistency in highlighted area of menu items

When a menu item is highlighted, there is more white on the right side than on the left side. In previous versions, this inconsistency didn't exist. I guess this is a regression and not intended behavior.

Please have a look at the attached screenshots. I've attached two screenshots, one where I used Qt 4.5.3, and one where I used Qt 4.6.3.

The 4.5.3 screenshot seems better to me, since the white on the left side of the highlighted area is equal to the white on the right. It seems that in Qt 4.6.3, the menu is simply one pixel too large.