On a Mac: go to Menu Builder and click New for Menu bar. File, Edit and Help (or whatever else) appears on the top left of the window, necessary for Windows apps, I understand.
But then if I check Set as Menu Bar on Mac OS, the Menu Bar items disappear as they should, but then 22pxls is cut off the top of the window, moving all objects with it.

I've had other problems as well, like objects disappearing (but still showing in the Application Browser and Inspector as living in the window) and graphics stretching to leave artifacts; and to cap it all, when I tried to build a test app, it was unable to because of an error. OK, I did try some dodgy scripting in some of the menu items which might have caused this...
So do Mac users have to add 22pxls to the height of their stacks to make allowance for this, and would anyone agree that this is a bug (or at the least a bit illogical, i.e the menu item names should just go without shortening the window height)
