P: LR4 doesn't display point curve adjustments made in LR3

Just installed LR4 and converted my catalog. Then I read the article in Chris' blog.

I immediately checked my installation and indeed I experience just the same bug.

All my tone curves are completely off although I did not even convert a single image to the new processing engine.
Hence there is nothing we can do to keep LR3 pictures with altered curves without reediting them again.
This is obviously not acceptable.

I can't believe no one really noticed that before.

Please fix this bug ASAP!

Thanks Tom, I would love to get my hands on the fixed test version, so please contact me by email and I'd be happy to help to test.

I have a second Lr3 catalog I can use for testing

We're currently working on a solution to this problem. Please let me know if you would like to be contacted via email to help us test this solution before we distribute it more broadly.

Regards,
Tom Hogarty
Lightroom Product Manager

I've got the same issue. I just wondered when I've read this thread, but then checked it myself. I save my settings in xmp-files, so I hoped this bug wouldn't affect my pictures, my camera is a Canon 450D.

But when i opened a picture with a point-curve in LR4... same problem as Chris. No switch to 2012 so far. I only imported my LR3 catalog.

I nearly freaked out, because in this moment I thought: What have I done? All work lost, because the settings are saved now by LR4 in the xmp-file?

I closed LR4 immediately and opened my old version 3.6 catalog in LR3 and the point curve was still there.

LR4 is unusable with this bug. Sorry for that. But I switch back to LR3 until this gets fixed.

http://imgur.com/a/4eIgN

In LR4 after upgrading catalog from LR3.x

Image one is how I edited it in LR3

Image two is after clicking the ! and setting the camera cal from 2010 to 2012. Notice how the numbers stay the same in tone curve, but the medium contrast is reset to linear.

Image three is same as image two, but I switched linear back to medium after the conversion.

So, it's an option to resume using 3.6 until this is fixed?

i would like to stress that this problem IS NOT RELATED to the 2012 develop: it happen BEFORE and the 2010 settings (tone curve and ...???) are not retained.

The conversion of a Lightroom 3.6 Library to Lightroom 4.0 has a problem.
The tone curve applied in ver.3.6 is not taken in the conversion process to ver.4.0. The curve is set just to "medium contrast", and the settings applied in the ver3.6 are not transfered.
In my case I have been applying the setting "Lineal" over the last years. In many cases of course the tone curve manually set. My in between more than 60.000 pictures have not been taken properly during the conversion process to Lightroom 4.0.
Please correct asap. So far I will have to continue working with version 3.6 due to this bug.

LR4 lost ALL of my tone curves last night. Needless to say with over 30,000 in catalogs this amounts to a catastrophic mess. Completely blew away LR4 and spent the rest of the evening restoring to LR3.6 How in the heck was this not caught in testing? Very poor standard work to allow such a miss to get into production code. Irritated doesn't quite describe what I'm feeling at the moment.