I've run into a really annoying issue... If I have a container that is higher than its parent container, it will add not only a vertical scrollbar, but also a horizontal scrollbar. It does this even if its width is set to 100% and it has plenty of room to display its contents. The really frustrating thing about this is that no matter how wide you resize the container, it will never be able to fit its contents...it's always missing the same amount of space.
To test, simply use the following code. Note the horizontal scrollbar that will not go away. <mx:Canvas width="90%" height="400"> <mx:Canvas width="100%" height="440"/> </mx:Canvas>