> They are visible when the mouse is over the content
no, they are a thin line until the mouse is over the line, then it animates to a scrollbar, try to change your theme back to one of the default one to see....
> They are visible when the mouse is over the content
no, they are a thin line until the mouse is over the line, then it animates to a scrollbar, try to change your theme back to one of the default one to see....