The unfortunate part would be converting 3 catalogs of over 30,000 photos only to discover the tonal curves were lost resulting in spending a fair amount of an evening restoring to 3.6. Adobe REALLY missed this big time. So far, my $79 has been wasted on a non-usable upgrade.
I'm not sure I understand the problem or if there is one. I just converted a catalog of ~15000 images Some have beed extensively edited in LR3 And I'm sure there are a few edited with LR2 So I have these Process 2003 and Process 2010. On conversion the Process is still 2010 and the tone curve and adjustment sliders are still where I expect them to be. If I convert any to Process 2012 I get a linear tone curve and the Tone sliders change to reflect the new fields. This should be expected, after all the 2012 Process has a completely different approach. If I leave the image with the original history and the process is still 2010. My image looks like it did in LR3. Nothing changed. With LR4 I can keep the image as they have been finaled or I can reprocess (and improve upon) what was already a pretty good image. Now am I missing something in the description of the problem or is there no problem?Thanks again -- though if all my curves are going to be reset, I'd probably just as soon wait.
It seems like whether this is a real issue should come out soon enough: either all curves are reset with LR4, or perhaps it's just a false alarm.
I'm still getting up to speed with LR, so for me it just helps to know if I should wait.
I haven't tried to reproduce it, but I believe the bug only affects the point curve, not the parametric curve. Try repeating that test but set the point curve to something wacky rather than setting the parametric curve sliders.