I notice that occasionally when building windows that the contentView is shifted up and to the user's left; it's up about 30 pixels and to the left about 4 pixels. It makes it difficult to "hit" a button; you have to click about 30 pixels lower than it shows on the screen to find it's rectangle. It appears that to be moving the contentView all the way to the top of the window instead of respecting the header (menu bar on Mac). Is this a known problem, and is it fixable? Thanks.