On the light skin you have changed the scroll bar it's hardly visible now. I have attached a picture which shows v136 (left) vs v135 (right). You can see the v135 scroll bar is darker and more visible to the user.
On v136 I had to guess there is a scroll bar.
cheers
beetraderĀ
Status changed from New to Fixed
Attachment image-0.png added
Attachment image-1.png added