My current wallpaper is a dark one, a picture of the center of our galaxy. Obviously, it stands in stark contrast to the light menu bar.
In an attempt to mitigate this nuisance, I have switched on the dark mode introduced with OS X 10.10, a.k.a. Yosemite.
I understand that there is some debate about both the concept and the implementation of the dark mode, but in my particular case, it really solves a problem.
And yet, every now and then, when I wake up my old and trusty 2011 MacBook Pro from sleep the dark mode mysteriously has been switched off again. I haven’t been able to find related information on the Internet, so it does not seem as if this is a common problem for a larger group of people.
This has happened and continues to happen with every version of Yosemite from 10.10.0 to 10.10.2.