multiple jit.gl.windows problem

Hello everybody,

i'me having a problem with having two jit.gl.windows in one patch, each linked to a seperate render context. On a windows 7 64 bit machine with a Nvidia 415GT M gfx card the two videos are rendering in one window. I see a very fast alternation of the frames of the videos, all in the same one window.
I tested this patch on different computers (also mac) and there it works perfectly, rendering each video in it's own window.

I've added a simple simulation patch, however I guess that with most of you it will work perfectly. Therefore i uploaded also a short movie demonstrating the problem on http://www.crewonline.org/max/ The framerate of the camera slows down the alternation of frames which is in fact much faster.

Could this be a bug somewhere in the gfx driver, or win7?

Tnx for your help,
Vincent