Final Cut Pro X 10.0: Distortion when creating Motion templates with non-square pixel aspect ratios
Motion templates you create with a non-square pixel aspect ratio, such as DV, HDV, or DVCPRO HD, do not behave as expected in Final Cut Pro X 10.0.
This article has been archived and is no longer updated by Apple.
This issue was addressed in Final Cut Pro X 10.0.1.
From Final Cut Pro X Help: