When resizing the window with an inspector open, it continuously flickers and flashes blank, sometimes making a slow, fast or partial fade in/out, others when you let go of the resize handle it does a bunch of flashes in burst (as if they were queued up).

Screen capture: http://cl.ly/0g2F0q2D3p1D

Seems to relate to code that adds/removes the "oo-ui-popupWidget-transitioning" class.

Version: unspecified
Severity: normal