I suspect your version of PS CS3 + Camera Raw is simply too old to be 
compatible with the output of LR 4 or 5. Since Camera Raw has certainly been 
developed further than PS CS3 and Camera Raw v2.x or whatever it is, you can't 
really expect all the LR 4 or 5 adjustments (which match Camera Raw 5 or 6) to 
be backwards compatible to too old a Camera Raw plug-in. 

I opened a raw file in LR 5.7, applied a preset with a bunch of radical changes 
to it, and exported it as a DNG file compatible to Camera 7.1 and later. I then 
opened it in PS-CS5.1+Camera Raw 6.7. All edits were in place. 

You can check what adjustments are actually in the file by using EXIFtool to 
output the original raw file's data and then the exported DNG file's data. 

The fact that your old PS CS3+Camera Raw can open the DNG at all shows a basic 
level of universality. Processing adjustments are dependent upon the version of 
Camera Raw, not DNG. 

Godfrey

> On Dec 17, 2014, at 7:10 PM, Igor PDML-StR <[email protected]> wrote:
> 
> 
> I think I encountered a weird bug in LR today.
> I edited photos in LR and exported them into DNG v 4.6, which is the version 
> compatible with the old PS CS3 that I have.
> When I opened that folder in Bridge, I found that the "local" changes
> (brush/mask adjustments) done in LR 5.6 have not showed up.
> 
> So, either DNG is not supporting local adjustments, - in ver. 4.6 or at all, 
> or LR is exporting incomplete information.
> The worst thing that neither LR, nor PS Bridge complain about any 
> incompatibility. So, this makes me uncertain: what other information is not 
> preserved. I guess I will have to resort to exporting directly into PSD.
> Oh, well, so much for the "universality" of DNG.


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