Hi
As I already mentioned, I don't have a G7, so all i say is just 'shooting in the dark'
but, let's check a couple more things:
what's your SD card ? If it is 4GB or bigger, check the formatting: CHDK doesn't particularly like FAT32,
which is the default format for cards > 2GB. If your working with these large cards, experiment with the
card that came with your cam (dunno - 16, 32 ? MB ) These should work fine.
ok that was it for the moment -
wim