The scenario is as follows:
Suppose you have a menu with many items at first level.
a) Clicking an item in the bottom part of the first level menu, the second level menu opens.
b) If you have several items at second level too, opening the menu makes it "float" towards up, probably to show all the items at display without need to scroll.
c) Closing the menu, the menu itself is no more anchored to the upper frame (as usual), but it remains like a zombie in the middle of the canvas
As a workaround, I should put the item on top of the first level menu, so that opening the second level menu, it doesn't move anymore in the frame.
You may try.
http://www.marcobrivio.com/Portfolio/Gallery/
Open the main menu, then choose: New York--->Rockfeller Center
Now, close the menu: the menu is lost somewhere in the main window.
Waiting for feedbacks and help.
Best regards,
Marco