(Found using SC 3.6.3 with Qt on OS X 10.7.4.)

Setting visibleOrigin doesn't work unless you defer a bit after the view is created .

EXAMPLE CODE:

(
// Window 1 -
w = Window.new("visibleOrigin not updated", Rect(10, 700, 400, 400)).front;

b = ScrollView(w, Rect(0, 0, 300, 300)).hasBorder_(true);
c = CompositeView(b, Rect(0, 0, 500, 500)); // 'canvas' is this big
c.decorator = FlowLayout(c.bounds); // now we can use a decorator

Slider2D(c, Rect(0, 0, 240, 240));
Slider2D(c, Rect(0, 0, 240, 240));
Slider2D(c, Rect(0, 0, 240, 240));

c.decorator.nextLine;
w.front;

b.visibleOrigin = Point(50,50);

// Window 2 -
w = Window.new("visibleOrigin is updated", Rect(610, 700, 400, 400)).front;

b = ScrollView(w, Rect(0, 0, 300, 300)).hasBorder_(true);
c = CompositeView(b, Rect(0, 0, 500, 500)); // 'canvas' is this big
c.decorator = FlowLayout(c.bounds); // now we can use a decorator

Slider2D(c, Rect(0, 0, 240, 240));
Slider2D(c, Rect(0, 0, 240, 240));
Slider2D(c, Rect(0, 0, 240, 240));

c.decorator.nextLine;
w.front;

{b.visibleOrigin = Point(50,50);}.defer(0.01);
)