If you launch the Unity Dashboard, there are the traditional 3 buttons in the top-left-hand corner. They look (something) like this:
X ― □
The X closes the dash.
The □ either maximizes or minimizes the dash, depending on it's current state.
The ― does..
..What exactly?
I know it's faded out, but couldn't it have the same function as close, or almost the same but have the dash fold into the top-left-hand corner?
Note: I always have my dash maximized, so to me they are the close, minimize and minimize button. Please use the symbols, so i know which one you mean.
Best Answer
This was changed to be like this by design. I don't have access to the document listed there which discusses the design, but I'd imagine it's preferable to disable one of the three buttons rather than remove it. This gives a more consistent look across the system.
There are a couple bug reports citing this here and here. It was also brought up in this mailing list.
The brightness bug has been reported here.