On computers running Mac OS X 10.5 Leopard, Master Templates (templates created in Motion) do not display in Final Cut Pro 6. If you open a Master Template in Final Cut Pro, it may appear in the Viewer and the Canvas as blank or black on a computer with Leopard.
This issue is addressed by updating to Motion 3.0.2 and Final Cut Pro 6.0.2.
Choose Software Update from the Apple menu to get the latest updates for your Final Cut Studio software, or go to Apple Downloads.