Browsing through previews in an old project I noticed a very annoying problem, which doesn't seem related to the “Unsupported image format” issue discussed here, so I am opening a new case…
Previews look fine in browser mode, but when some are opened in Viewer mode showed a corrupted image, distorted and in black&white !
here a screenshot I took of the preview I rebuilt from the master next to a JPEG I found of the same file:
Some of the affected masters, viewed with Preview.app, show the same problem, while with other software is ok (Photoshop, Graphic Converter etc). This led me to think it could be a problem at OS level… but then other masters show the same problem in any software!
Any help will be much appreciated, as these are files I need for work!
This project used to be managed, then i moved to be referenced.
I've run every disk maintenance and Aperture library repair routine, to no avail.
Obviously the masters in the daily scheduled backups I have suffer from the same problem!
iMac 27” 3.4 GHz, OS 10.8.4, 16GB ram, Aperture to the last version, system and library on SSD disk and masters on internal 2TB HD