[CrazyFlasher]

public class NewClass {
	private var v:Vector.<Sprite> = new Vector.<Sprite>();
		
	public function NewClass() {
		test(v);
	}
		
	private function test(value:Vector.<DisplayObject>):void {
			
	}
		
}

Ошибка:
Error: Implicit coercion of a value of type __AS3__.vec:Vector.<flash.display:Sprite> to an unrelated type __AS3__.vec:Vector.<flash.displayisplayObject>.

Лажа ведь? Почему?!