I was experimenting with CHDK's Auto ISO on my SD990 and found this particular feature limiting because the lowest shutter speed it will select is 1/8 which is faster than the camera will do on its own. As a result, with CHDK, I am getting higher ISOs than necessary. For example, on a certain shot in dim lighting, the camera's own Auto ISO selects 1/2 second and ISO 400 and the shot comes out clear. With CHDK, it will select 1/8 second and ISO 1250.
IOW, CHDK is too conservative here. It would be helpful if there were 1/2 and 1/4 second options in the CHDK menu. Is there any way to add those options? Would a script do it?
The second issue I am having is that sometimes the CHDK menu appears pixelated and faded out -- to varying degrees and sometimes to the point where it can't be read at all. If I turn off the camera and turn it back on, then switch to shoot mode before calling up the CHDK menu, the problem goes away. This has never happened to CHDK on my A710. Anyone have an idea what's going on here?