Comment 2 for bug 601107

I think this may be deliberate, as part of the subliminal cue to users
that icons *can* fold. I agree the current implementation is jarring (it
all seems to happen haphazardly rather than smoothly). David S should
comment on the desired entry and exit behaviour, and we should make sure
it feels slick, with a flash mockup if needed.

At a minimum, nothing should appear till we can render it fully (no
white placeholder) nor should things feel jaggy or laggy, so we need to
be confident the animation can be smooth if it's specified.

Mark