I've made some testing. See the report below:
CHDK for sx400is-100b
//Report on testing by Astol no.1
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I've managed how it goes with starting. It depends on the time I hold the play button. If I just click it, camera starts in photo mode. If I hold it, camera starts in the play mode.
But if I hold it too long, camera Shows the splashscreen and turns off – bug.
When I open the flash and set it on automatic, It shoots only when flash is required. When the automatics decide to not use the flash It will not shoot until the flash is open (or automatics turned off)
Games are working fine
Tools are working fine
Settings works fine
Live histogram works fine
Changing flash intensity works fine
Zebra is not working properly. Problem is that it shows red rectangles in upper and lower part of display and covers the wiew.
Raw shooting works, but is not much useful (fisheye effect)
Scripts are working fine (I've not tried remote and some of the test scripts)