Hi, I built a simple patch with only one each:

- Grabbr - Viewr

When I move the video window to the projector and enter full screen mode (my monitors aren't mirrored), I get flashing artifacts on my internal monitor, making the computer unusable.

Details: - Mac OS 10.8.3, - Max 6.1.3 - Macbook 17" with 2.3 Ghz and 8 GB RAM. - Max is the only app running, this is the only open patch. - tried two different projectors.

Any ideas what might be the problem?

thank you!