Thanks for testing, I'm glad to hear it runs.
mbv
Loaded fine (using STICK) on an 8gb card (FAT 32). So far passed my initial tests OK. The only gripes are:
1. Very small font in chdk menu and in osd
Yes, this is an unresolved issue for D6 cameras. You can change the menu font, but not the OSD.
2. The osd starts blinking after a couple of shutter half-presses. Then keeps blinking even if no button is pressed.
This is probably normal a normal D6 issue too, though without seeing it's hard to be sure. The OSD blinks whenever the Canon UI updates, if face detection is on or you are in a mode like auto that constantly updates, it will blink a lot. Same if the canon battery indicator is blinking.
One more thing. I initially used for the test an old 4gb card (says class 6 though). It did not work --- could be a card issue.
When you say it didn't work, you mean the camera just booted without CHDK?
Card size and speed class really shouldn't matter for CHDK, but if the card lock isn't detected it won't work. Cards formatted exFAT can't be made bootable, but I wouldn't expect that on a 4 GB card.