Color Management Problem in Acrobat

When I load an image with an embedded color profile into Acrobat 7.0 it is not displayed with the same colors as when I load it into Photoshop CS3. I have the same working space in both programs. In Photoshop the color is accurate but in Acrobat it's so bad that pure grays look almost brown. I've set the color working space in both Acrobat and Photoshop to North American General Purpose defaults. I've also unchecked "Output intent overrides working spaces" in Acrobat to see if that helped. It did not.
As a sample, I created a color jpeg image containing a gray square that has RGB values 192-192-192 and that has an embedded profile of sRGB IEC61966-2.1. I opened this image on a single monitor in Photoshop CS3 with a working space profile of sRGB IEC61966-2.1. I also opened that very same image on the same monitor, at the same time, in Acrobat v7.1. I got the image shown at this URL:
http://www.JustPhotos.ca/post/acrobatcolorexample.jpg
I then took a screen capture of the image and opened the screen capture in Photoshop. I used the Info panel in Photoshop to show that this screen capture image has RGB values for the gray square in the Photoshop window of 192-192-192. These match the original. However, the captured image in the Acrobat window shows a change in the gray square from 192-192-192 to 177-167-140. This color is uniformity distributed across the square. Pure black and pure white don't get changed by Acrobat but everything in between does.
As far as I can tell, this seems to pin down Acrobat as the source of the change. On the other hand, I have no idea why it's doing it or how to prevent the change. Help appreciated.

Your list appears incredibly short compared to what I see, missing whole sections...
That could imply that the ProPhoto RGB profile file (and others) are missing from your Windows subfolder for profiles...  Check to see if this file exists on your computer:
C:\Windows\System32\spool\drivers\color\ProPhoto.icm
This file is on my Windows 7 x64 Ultimate system.  Assuming it's not there on your system, the question then becomes "why not?"  Have you uninstalled something after having installed Photoshop CS5?
Check also for the file here; I found another one there on my system.
C:\Program Files (x86)\Common Files\Adobe\Color\Profiles\Recommended\ProPhoto.icm
-Noel

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