Update: I am working with Adobe on tracking this down.
The latest Adobe Camera RAW (ACR) has proven itself to be very unreliable. I’ll open a batch of images in Photoshop CS5 for review. After investing some work and time in adjusting them one by one, Photoshop will hang with a rainbow beach ball. A force-quit is the only option; all work is lost.
This is NEW with version 6.6, released very recently.
The files that cause the issue can be DNG or NEF, and any file with an issue can never be opened. Yet the same files can be processed just fine with RAW Developer or Capture NX2. Indeed, re-saving a NEF file from NX2 results in a NEF file that ACR can handle just fine.
This is a very serious workflow problem for me; I never know when I'll lose my work.
Adobe Photoshop Version: 12.0.4
(12.0.4x20110407 [20110407.r.1265 2011/04/07:02:00:00 cutoff; r branch]) x64 Operating System: Mac OS 10.7.2 System architecture: Intel CPU Family:6, Model:44, Stepping:2 with MMX, SSE Integer, SSE FP, SSE2, SSE3, SSE4.1, SSE4.2, HyperThreading Physical processor count: 12 ... Camera Raw 6.6 (261), Copyright © 2011 Adobe Systems Incorporated - from the file “Camera Raw.plugin”
If you’re lucky, you’ll get this warning, but most of the time ACR just hanges with a rainbow beachball.