DJLTHEGREAT Thanks testing and reporting. Most looks good, a few comments.
Ndtest - doesn't have an Nd filter so not testing it.
It almost certainly does, the port is defined as having ND, and virtually all ixus/elph do. On these cameras, the Canon firmware doesn't say ND filter anywhere, it just treats it as aperture. If you run the script we can confirm.
Md_tune - min = 20, max = 1080, average = 280
This look like some triggers were missed. The script works by turning on the AF assist LED and checking how long it takes to detect, so it can give bad results if the scene or lighting causes it to miss the LED, or if unrelated lighting changes trigger. A good scene is a blank wall in a relatively dark room. If you watch it running, you should be able to tell if there are misses.
I found out that you need to turn 'review image after shooting' off, because it won't automatically go back into rec mode after taking a picture.
This is normal behavior for scripted shoot when review is enabled. The ubtest script should probably detect this but it doesn't.
If you could check Miscellaneous Stuff -> Show Memory Info in the CHDK menu and report the "Free Memory" value that would be helpful.
