Hi John
Thanks for the suggestion - the black screen for nighttime kiosk is a great idea. The Kiosk app looks quite good as well - low overhead as far as app go as well. I’ll have a look at that in more detail.
Just wanted to point out though - you can get the black screen heuristic images working fine in ipad touch. This is with as you describe a 1x1 pixel transparent png as +false image, and a black png as true image.
If it is just a black screen you are swapping with the solution is to make the size of black screen really large - 50% bigger than screen size is needed. This way despite the change in anchoring points (which occur given image size differences) still big enough to blank out entire screen.
Glenn
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