@matigo I never noticed it before, but I haven’t been using two displays for more than a few months. Others have told me it’s been there for decades, certainly 15 years. It’s present on my 2005 12” PowerBook. And finally I can use the full 1680 x 1050 settings on my 2005 20” Cinema Display with the PowerBook by placing the 12” display under the 20”, dimming & ignoring the 12”. Just have to make sure the dock is on the left or right.