showFocused: false doesn't seem to do anything on a button

Referencing: http://www.smartclient.com/#toolstrip

Several of the buttons (Bold, Italics, Underline) have the setting

showFocused: false

However, they behave the same as the other buttons that do not have this setting. I've tried setting it to true and it behaves the same.

I was expecting that with showFocused: false, there would be no appearance change when the button is hovered, which is desirable when the button is a checkbox type. In the showcase and in my own application, setting showFocused: false doesn't seem to make a difference. When the button is not checked and it is hovered, it looks the same as when it is checked.

The problem is that when you un-check the button, the look does not change until you hover off the button.

I've tried it with many different skins, all with the same result.

Is this by design or a bug? Is there a workaround/fix?

Or am I looking at the wrong setting? I would like the button to not change its look when I hover over it.