MTguy wrote in post #15803894
I have LR 4.4 and CS5. I had been getting that warning box and just clicking "open anyway". I had not really noticed any problems, but yesterday saw some fairly major conversion errors in the photo when opened in CS5. I got on the photoshop website and saw an explanation that CS5 can only use the raw converter up to 6.x. Not the new 7.x. This means it cannot fully see the lightroom changes to the files and sort of guess at them. The fix seems to be you can either save the files as a tif and then open in PS, or upgrade to CS6.
The very last version of ACR 6 (not sure of the full version number not at my computer right now) avilable on the Adobe web site is aware of Process 2012 for the cameras it knows about. This is usally sufficient for bringing images into PS, it can even manage to open them as Smart Objects. If you open as an SO though you loose the P2012 tools from the interface, the P2012 conversion is there you just loose the ablity to make tose adjustments, comon tool between P2010/P2012 mostly work as normal. This is the good side.
Now the not so good. I often end up with artifacts along very high contrast edges. Also the CA/Fringing tools often seem to have problems carrying across, even though the tools seem to be the same. This can be a big issue for me with my aviation images, where very high contrast edges are comon, as is CA on my 20D even with a 100-400L. The new Highlight/Shadows recovery are also really useful in this situation. In these difficult situations I end up having to export as a .PSD file which will be fine and looks just like the image dose in LR. I understand that this is due to ACR being used to do the conversion that is imported, not LR.
Alan