Hey, I've been a very happy CHDK user (with an A570IS) for a few weeks now. I've just bought my second memory card and I'm having problems getting CHDK to load from it.
My first card was very nice -- a SanDisk Ultra II, 1 gig. I got the latest Allbest (#49) running from it, no problem, and have been using it for a few weeks.
I got a second card, a much cheaper one, from PNY, also 1 gig, to use as a backup. I put it in the A570 and had the camera give it a low-level format. Then, using a card reader and my computer (a macbook) I copied my PS.FIR and DISKBOOT.BIN files from the old card directly to the root directory of this one.
No love! I don't get a firmware upgrade menu item at all. The camera behaves as if PS.FIR and DISKBOOT.BIN are not there at all. I tried flipping on the lock but then the camera just complains about a locked card. Still no firmware upgrade menu item.
Just to make sure I was doing the right thing I re-downloaded the zipfile of the build that had worked for me before, unzipped it and copied *those* files in there. No effect.
Any obvious things I should check on here? I have no idea what I did differently from the old card to this one. Maybe I shouldn't have low-level formatted it? No idea.
Thanks very much for any assistance!