Under Windows, middle clicking Sublime Text 2 doesn't open a new window

Under Windows Vista and 7, you can middle-click an application's taskbar button to start a new instance or open a new window.  For example, middle-clicking Firefox's button will open a second Firefox window with your homepage loaded in a tab.  Sublime Text 2 doesn't honor this and instead performs no action.  Instead, it should open a new window with no files open.