Quote:
Actually, this is by design and not a regression bug.
The reason for this change is that some people want the taskbar to stay hidden behind their fullscreen apps (videos... etc) even when that app doesn't have focus. While some people, like yourself, want the taskbar to appear again once the app has lost focus. There isn't a "right" way to handle this, so I will be providing an option to toggle this behaviour in the next version.