Found this forum after purchasing my SX260. Might have bought a different camera if I would have known about CHDK. Not that I am disappointed with the SX260, just that I would love to have RAW.
Anyways, I was able to load and use 100c beta 4 (not able to use beta 5).
If this is the correct place to post found issues I have one.
I found when using continuous focus and normally with 1/2 zoom or more and when 1/2 pressing the shutter the screen will go black, not all the time but it will happen if you continue to release shutter then 1/2 press. You will then need to press the power button and it will turn back on but without the CHDK firmware loaded.
I was trying to frame a flower in macro mode with the wind blowing so I would 1/2 press, lose the frame I wanted, release shutter, frame, 1/2 press shutter and sooner or later it would freeze.
Other than that (and the slow write times for raw) I have not had any issues. Still need to learn all the things that can be done with CHDK.
I now have some dng files from my last camping trip that I will have to play around with in Lightroom 4.
Thanks to all who work on these programs.
Tony