Comment 4 for bug 577610

Since I related a question on partly black captures in multi monitor environments, I tested with the following monitor configuration with Mac 10.6:
primary: 1920x1200, secondary on the left at (-1280,0) with 1280x960

captures on primary:
there is an additional x-offset (to the above mentioned ones with single monitor) with the width of the secondary monitor.

captures on secondary:
same effect as for a single monitor situation, with the single (0,0) being in this case (-1280,0).

so the above example would read:
capture wanted: capture(-1080, 100, 200, 100)
you say capture(-1080, 100, 400, 200)
and at least you can see your wanted image in the lower right part of the captured image.