>scanned images are going pixelated
Faced the very same (or similar?) problem while trying to resize photos made by
digital camera. Very similar "grids" appear on nearly-flat surfaces with a bit
of noise (like on sky). Surprisingly, faced the very same grids not only in
GIMP, but in some other programs as well (in Image Viewer in Ubuntu 14.04, for
example), so there may be a problem with underlying library (GTK?), not with
GIMP itself.
Here is an full-size example image:
https://drive.google.com/file/d/0B2nZFc31UFnoNUVTcGpoUHFSbm8/view?usp=sharing
And it's resize (width 1920 px) - grid is easily visible:
https://drive.google.com/file/d/0B2nZFc31UFnoT1ZvM0xxQW8xSU0/view?usp=sharing
Tests were performend with gimp 2.8.10-0ubuntu1 on Ubuntu 14.04, and with gimp
2.8.14 on Windows 7 Home.

Attachments:
* 
http://www.gimpusers.com/system/attachments/195/original/gimp-ubuntu-scaled.png

-- 
renat (via www.gimpusers.com/forums)
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