[ale] Nautilus (2.0.6/RH8) jpg display

[CB Genrich]

When I use Nautilus (2.0.6 on Redhat 8) to view a folder
with .jpg files (maybe others?) I find that many of the
miniatures are only partially shown.  It can be hard to
preview the image this way.

What generates these miniatures, why would it make the
lower 50% to 90% sometimes be just gray, and how could
I force it to render them completely?

-- 
  CB Genrich
 Kona Kahuna Nui, LLC
 www.kona-kahuna-nui.com
 cb at kona-kahuna-nui.com