When is layoutSubviews called?

I had a similar question, but wasn’t satisfied with the answer (or any I could find on the net), so I tried it in practice and here is what I got:

• init does not cause layoutSubviews to
  be called (duh)
• addSubview: causes
  layoutSubviews to be called on the
  view being added, the view it’s being
  added to (target view), and all the
  subviews of the target
• view setFrame
  intelligently calls layoutSubviews on
  the view having its frame set only
  if the size parameter of the frame is
  different
• scrolling a UIScrollView
  causes layoutSubviews to be called on
  the scrollView, and its superview
• rotating a device only calls
  layoutSubview on the parent view (the
  responding viewControllers primary
  view)
• Resizing a view will call layoutSubviews on its superview (Important: views with an intrinsic content size will re-size if the content that determines their size changes; for example, updating the text on a UILabel will cause the intrinsic content size to be updated and thus call layoutSubviews on its superview)

My results – http://blog.logichigh.com/2011/03/16/when-does-layoutsubviews-get-called/