OS X 10.9 x64
JDK 8 b117

Test test/java/awt/dnd/DropTargetEnterExitTest/MissedDragExitTest.java failed

Exception in thread "main" java.lang.RuntimeException: Failed. Drag exit was not called
at MissedDragExitTest.main(MissedDragExitTest.java:107)
Java Result: 1

Seems the Util.waitForIdle() does not work as expected.

    Util.drag(r,
            new Point(FRAME_LOCATION + FRAME_SIZE / 3, FRAME_LOCATION + FRAME_SIZE / 3),
            new Point(FRAME_LOCATION + FRAME_SIZE / 3 *2 , FRAME_LOCATION + FRAME_SIZE / 3 *2),
            InputEvent.BUTTON1_MASK);
    Util.waitForIdle(r);
    if (!dragExitCalled) {
        throw new RuntimeException("Failed. Drag exit was not called" );
    }

After starting Util.drag() there is a call of Util.waitForIdle() method.
But actually main thread does not wait for idling robot thread. It immediately verifies dragExitCalled propperty, that is still false.
If set shorter track for mouse dragging (like 5 pixels), dragExitCalled has time for changing it state, and entire test passes.