The (color of the) border of the selected tabs has been changed. However is still see a minor (related) issue. When a tab is active (on page of the tab), the tab gets a light background. However when hovering over the active tab the border still change to a lighter border. It may be pretty hard to notice, but now that I have seen it it cannot be unseen.
I suggest that the active tab always has the lighter border (same color color as on hover).
As requested a screenshot: