I know that this is an old topic, but I just picked up this old A495, and I'm trying to find the firmware version with no luck. I already have CHDK loaded on a number of my cameras, but this one definitely has me stumped. ACID does not work. Starting in play mode, and pushing fuct, plus other keys does not work. I've tried every combination of keys. I do have the ver.req file loaded on the 8gig card. Any ideas?