Hi,
I am having the same problem, used an NTSC camera for testing everything but the camera used in the setup is apparently a PAL.
No video source connected or with the NTSC camera it works perfect, the other one only shows the camera's output.
Took me some time to get the NTSC up and running as well, transferring the fonts with hyper terminal or tera term didn't worked as i hoped.
If I get it working I'll let you know.
Grtz,