S90 Untethered starts CHDK fine. I only tried bringing up menu and OK.
This is the stock build // thanks mi amigo ==>> I will test your new build tomorrow -- you beat me again
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When I first connected to chdkptp, could not get rec to work // froze camera with blue light ON. Had to remove battery to reset camera.
2nd time connected // it's working for now.
The problem .......
It seems to me like you're "zooming-in" something like cropping off the bottom part of the image // look at the camera LCD and SS of liveview.
Hopefully not a big job to fix // because you have 360x270 it seems with Scale A/R checked (but I didn't pixel-measure).
dump
http://www.sendspace.com/file/w0l1r4It's very late and this is all I can do until tomorrow // I hope you can work with it ... in the meantime I will do the special CCD tests possible w CHDK.