Unfortunately two important cameras, the Canon 5D.3 and the Nikon D800, came out during the transition between LR3/4 and PS-CS5/6 so Adobe released beta versions of LR and ACR to help tide people over, but what gets released when is kindof messy during the transition.

A major version release requires debugging and testing so the functionality, including new camera support, must be frozen earlier as compared to mid-version camera-support releases that have minimal coding changes.  ACR7-beta functionality was frozen back in February so has even less camera support than ACR6.7 beta, which confused PS-CS6-beta users as well.

Just so you’re aware, there is a bug when doing extreme adjustments in the new toning model and geometric lens-corrections have been applied, so be careful with that in the new LR4.1 RC2.   Eric Chan has said the bug will be fixed in the release version of LR 4.1.  The same bugs exist in the final ACR 6.7 that came out within the last week, so it is unclear what the status of a bugfix is for PS-CS5 users.

Here is a forum post with more information.  Also check out the other threads people refer to with other examples of the bug:

http://forums.adobe.com/message/4380573#4380573

dlaspa wrote:

 

One more question; ACR 7.1RC was released today, with support for the 5DE MkIII.  Before I just diving in I have to ask: Do I install LR 4.1 RC2, or stick with LR4.0 and update ACR7.1RC?  I have not had any luck trying to answer this question myself.  Just trying to keep this process clean.

Camera Raw is a plugin for Photoshop.  Lightroom is its own application that just happens to use the same rendering code that the plugin uses.  Updating the Photoshop plugin has nothing to do with Lightroom.  For Lightroom, you have to update the entire application.

I downloaded the lr4.1 rc2. And it still won't import or recognize mkiii pics.

RAW........... not sRAW not mRaw

I did finally get the pics imported by copying them as DNG. And I did see a DNG label on the bottom right pane of Lightroom. IT took me about 6 times to get this done. I downloaded the 4.1 rc2 3 times, restarted my computer twice.....back in an out of all apps (MAC) numerous times and I never saw anything clear as to how this 4.1 rc2 would work or apply itself.

Anyway, I got them in Lightroom and on an external hard drive, but what a pain in the ***!

Yes I installed it 2-3 times