I have a window-like MXML component with a title bar (currently done with VBoxes and HBoxes) and a content area (a Canvas). Rolling over an info icon in the tile bar causes another component to be overlaid (made visible) in the content area.
I used rollOver on the info button to make the overlay visible, and I added a rollOut on the root (window-like) component and on the overlay itself to hide the overlay. The puzzling thing is that the root-level rollOut fires when I move the cursor out of the info icon to the right (remaining within the title bar), but not when I move down towards the content area and overlay (even with a gap between the title bar and overlay top). This is actually not a terrible thing, user-experience-wise, but it's not what I expected. Any ideas what's going on? Thanks.

