Windows with the windows maximized?
What exactly are you doing, using New window or Go To Related Records to open a new window?
Windows OS 7
Im going to various layouts and adjusting the window size for each layout.
No new windows.
The FM application window remains the same size and the database file window changes.
I dont remember this happening in FMP 10 (of course I was using 10 on a mac at the time)
The only case where I've seen this happen is when opening a new window takes the system out of the windows Maximized state, but then I usually keep only one to two windows open and visible at the same time--with one window serving as a small modal dialog floating in front of the other. So maybe I just haven't encountered this issue.