YUI: 0.12 Overlay Issue

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Show a panel with the following event subscribers:

beforeRenderEvent, changeHeaderEvent, changeBodyEvent

Works
Show a panel with the following event subscribers:

beforeRenderEvent, renderEvent, changeHeaderEvent, changeBodyEvent, beforeShowEvent, showEvent, beforeHideEvent, hideEvent, showMaskEvent, hideMaskEvent

Fails - No Panel shown, only mask
Show a panel with the following event subscribers:

renderEvent, beforeShowEvent, showEvent, beforeHideEvent, hideEvent, showMaskEvent, hideMaskEvent

Fails - No Panel shown, only mask