I seem to be having the opposite problem of others dealing with aspect ratio. I had no problem in previous projects changing the settings to 16:9 in motion and then importing them to DVD Studio Pro for motion menu creation.
But for this project I need to revert back to 4:3 and no matter what I do, it continues to output 16:9.
I have trashed the preferences. I have used the NTSC DV setting. In preferences >canvas > film zone the default was anamorphic but I changed it back to 4:3.