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"Theres no other way to open the Popup Notes app."

I've got a Note I, purchased at a sale price about six weeks ago...
Using this model, if I take out the stylus, hold down the stylus side-button, and double-tap anywhere on the screen, the "Popup Notes" app opens. Has this feature been removed from the OS?
BTW: Long-hold on the "Back" button yields nothing under Android 4.0.1 with TouchWiz...