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That does look very strange, but I've never seen it. I just went through my raw library looking for similar images to test (dark tree limbs against blue sky) and could not duplicate the problem.
However, we need to remember that the camera profiles are different for specific camera models. The Camera Landscape profile for my Canon 5D2 has no problem, but that does not mean other camera model profiles are OK.
I'd suggest you upload the raw file somewhere and let others test it. That would help you determine if your problem is limited to your system or is across the board. If you have never uploaded a raw file, check out Dropbox.
Also, you might get better response at the Adobe Camera Raw forum. Lot's more knowledgeable users there, including the Adobe Camera Raw authors.