Small update in cr2hdr regarding horizontal banding. Basically, after matching the brightness (ISO + black difference), there's still some room for improvement, so this update does some fine-tuning for every dark line (so it matches the brightness of its neighbours).
The result is pretty subtle. I didn't find any example with singificant banding in final output, but it's clearly visible in the intermediate results. Here's a full resolution blending (the one that minimizes aliasing, but has pretty high noise):
Before:

After:

So, the algorithm simply has cleaner data to work with, and it's less likely to pick up false detail. Also, the noise in full-resolution areas is less correlated (whiter). With this, I was able to push the algorithm even more towards full-res shadow detail without increasing the artifacts (so the forest shot is still rendered very well).
Example:
Before:

After:

For prefix, I think switching the color space has the same sync issue. Didn't try, but I don't see why it will be different.
There's no beep for ETTR with SET on any other camera; I look at raw zebras, histogram and ETTR hint.