On Wed, Oct 12, 2016 at 11:06 PM, David Vincent-Jones
> When S/H is used with gaussian param ... both the histogram and the top left
> (small) image go blank.
> I have also found on some occasions that the main image also blanks out.
> This does not occur if bilateral-filter is selected.
> darktable 2.1.pre+git1806.5b5c954-1.1
That is old.
Please try with current git master.
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