In previous Ubuntu Unity Launcher’s auto-hide behavior there’s a ‘dodge windows’ option. This feature’s dropped from Ubuntu 12.04 Unity.
damianatorrpm has created a couple patches that will revert the Canonical changes and re-add the behavior back to the source.
I'm seeing this unwanted behaviour eversince Unity came to Ubuntu. The Unity's Launcher randomly "steals" the endpoint for the minimizing animations from Docky. In other words, when I click on an icon in Docky to minimize a window, that window minimizes to Unity instead of Docky.
In the Unity panel, when you left-click on an application that has multiple windows or instances open, it displays the Spread Mode, but when you left-click on a solitary application, it does absolutely nothing.
I'd like to be able to click on a solitary application and have it minimize or maximize, like in a traditional taskbar.