Received via mail from Nicolas Brisset:

While I'm writing you a mail, I'd like to add another proposal. I fell into the trap a couple of times, and I guess I'm not the only one: when using histograms, the automatic cut-off is computed only on file counts (I guess). I had some directories with few but huge files (typicall core dumps or archive files) and when I checked the histogram I first could not see them. I would suggest adding a warning overlaid on the histogram, or maybe an option in the settings to compute the cut-off based on file counts (as now) but to check whether the sum of files shown in the histogram accounts for the right percentage (99%?) of the total size.