Thank you so much for all the work. I am a big fan of CHDK from using it on my previous unit Canon A590IS.
Now I have a SD1200IS with original firmware version 1.00c. I have downloaded the latest CHDK build for model ixus950 from the build server, copied on a freshly formated and made bootable SDHC card using CardTricks but can't seem to run CHDK for some reason - whether with locked or unlocked SDHC card. Play->Menu->Update firmware is option not visible at all.
Then, after reading through this thread I changed the PS.FIR filename to PS.FI2 which enabled Play->Menu->Update firmware menu option but as soon as I select that option I get "Firmware file error" message. This error comes regardless with full CHDK directory structure, PS.FI2 and DISKBOOT.BIN file and PS.FI2 file alone on teh SDHC card.
What am I missing? Any help will be greatly appreciated.