Although a stable beta CHDK release is available for SD990IS firmware GM1.00E, my new camera reports GM1.01B. I tried loading the beta for GM1.00E but, of course, it did not work.
I am wondering if anyone is working on this firmware version or if there is anything I can do to help. I bought this camera specifically to use CHDK so I am motivated to provide any help I can.
Alternatively, does it seem likely that I could downgrade my firmware to 1.00E?