I think the problem is LR 4 is reading the embedded profile and can't find the correct profile, even though ACR 8.1 beta is installed. I think LR 5 beta should be able to read it by default.
As Alessandro mentioned, if you open the file in CS6, the ACR 8.1 pop-up window will select the correct profile "Adobe Standard" and the colors will look correct.
The easy fix to get LR 4 to read it is to copy the Ricoh GR .dcp file to the correct location. I'm on a windows machine, ACR 8.1 installs to
"C:\ProgramData\Adobe\CameraRaw\CameraProfiles\Adobe Standard\" on OSX i think it installs to "Library/Application Support/Adobe/CameraRaw/CameraProfiles".
Copy "Pentax Ricoh GR Adobe Standard.dcp" file to "C:\Users\[your username]\AppData\Roaming\Adobe\CameraRaw\CameraProfiles\" on windows or
"Macintosh HD/Users/[your username]/Library/Application Support/Adobe/CameraRaw/CameraProfiles/".
Strawhat20,
I don't think this works for Lightroom.
The Mac "Library" is found under the main hard drive, not the individual user, so the path is just Macintosh HD/Library/Application Support/Adobe/CameraRaw/CameraProfiles....
Then under Camera Profiles there are two folders, one for "Adobe Standard" and one for "Camera". Within the "Adobe Standard" folder, there are individual profiles for the "Nikon Coolpix A Adobe Standard.dcp" and there is already another one for the "Ricoh GR.dcp", so the Ricoh GR.dcp file already seems to be where its supposed to be (although it doesn't contain the term "Adobe Standard" in its title. In the "Camera" folder are various cameras that have multiple profiles you can choose from. The Nikon A is included there and has a folder with DCP files for Camera Landscape, Camera Neutral, Camera Portrait, Camera Standard, and Camera Vivid. When processing a Nikon Coolpix A file in Lightroom, under "Camera Calibration" and then under "Profile", you can choose from "Adobe Standard" or any of the "Camera" profiles I just listed from the "Camera" folder.
The problem seems to be that when I open a Ricoh GR DNG file to process it, under "Camera Calibration" and then "Profile", I don't see "Adobe Standard" or any other options. I only get "Embedded" with no other options to choose from. I'm assuming this is because the file is a DNG file rather than a proprietary raw file and Lightroom must assume that the DNG file already has all of the color information "embedded". So there's no choice to choose the Adobe Standard profile that should then pull the profile from the Ricoh GR.dcp file in the "Adobe Standard" folder. The file is there, but the program doesn't seem to know how to use the information it contains. I even tried changing the name of the DCP file to "Ricoh GR Adobe Standard.dcp", restarted Lightroom and tried again, but it still only shows "embedded" as the only option.
So, any more thoughts. From ANYONE????
The solution seems so close, yet so far away...
-Ray