Comment 10 for bug 1967618

The proposed package fix the bug for me.

Tested with different directories with mixed content, thumbs.db and empty test file named "file.azerty".
Tested with zoom, rotate, thumbnail size, change sorting, select image by thumbnail list (click and mouse wheel).

apt-cache policy ristretto
ristretto:
  Installé : 0.10.0-1ubuntu0.1
  Candidat : 0.10.0-1ubuntu0.1
 Table de version :
 *** 0.10.0-1ubuntu0.1 500
        500 http://fr.archive.ubuntu.com/ubuntu focal-proposed/universe amd64 Packages
        100 /var/lib/dpkg/status
     0.10.0-1 500
        500 http://fr.archive.ubuntu.com/ubuntu focal/universe amd64 Packages