Apple the MB Looks filter to a clip and the clip goes completely black?

I can edit it fine inside Looks Builder, but on the canvas and viewer in Final Cut, it is just black. Here are some pictures:

BEFORE:

http://img710.imageshack.us/img710/7383/picture8uv.png

AFTER:

http://img691.imageshack.us/img691/3035/picture9ogl.png

Here is an example of the mix down about half way, to show that magic bullet is just placing black over the clip:

http://img710.imageshack.us/img710/4343/picture10ql.png

Did you upgrade recently your OS or FCP software?

Did you upgrade your MB Looks to v1.4 (for After Effects CS5 or similar) .. I understand the v1.4 upgrade is not yet compatible with FCP (which needs v1.2)

Cheers
Andy