(A) I should add that when LR automatically selects the just created virtual copy rather than the original seems arbitrary - just before I wrote my question, the original remained selected; just now the virtual was. I had not changed the settings or preferences. Could there be some subtle control depending on exactly how I depress the ' and command key? Or am I missing something obvious?
There is no such setting.
You can tell if you are working on the virtual copy in the Develop Module by looking in the History Panel, and in the Library Module Grid because there is a "page-turned" icon at the bottom left of the image.
With regard to (B), I am very very skeptical of Adobe's explanation, I can't imagine how a virtual copy can be corrupted but the original is not corrupted, both are based on the same original image.
(A) There is no such settings for virtual copy. If you create a virtual copy of an image, you will be moved to its virtual copy for further editing.
(B) Virtual copy can be merged to HDR, all what you need is images with different exposures to produce HDR effect.
I'm having the same problem. Until 3 days ago I could merge virtual copies to make an HDR photo in LR but this has suddenly stopped working. Choosing 3 vc's and the 'Merge to HDR' produces no response whatsoever. No error messages.
Also, often finding that the histogram in Develop mode fails to respond to changes to Exposure etc. The adjustments show in the image but not in histogram.
All this weirdness started 3 days ago, no apparent reason for it. Computer working normally otherwise.
I have tried the usual remedies like disable Graphics Processor and resetting prefs, nothing has made a difference.
Using 2013 iMac with 16GB RAM, Yosemite (latest) and LR 6.1.1.
Anyone got any ideas?
Please try to reinstall Lightroom and check if it helps.
No offence but this kind of response is not good enough. Asking people to spend large amounts of time trying to manually disable graphics processors, continually reset or trash preferences files or re-install Lightroom is really asking customers who have paid good money to solve Adobe's problems for it. If the program had been properly tested before release the many of these problems would not be happening. I feel particularly sorry for PC users who seem to be suffering way more than we Mac users. Lightroom gets more flaky with each release. Capture One is growing more attractive by the day.
I like what LR does, when it works properly, and do not want to have to migrate to another application but I resent paying money for a program which has large numbers of faults which should have been identified by adequate testing prior to its release. I would rather the next version, LR 7, is released late than be rushed out full of bugs just to satisfy some accountant who wants to meet a deadline. This is sloppy practice Adobe, you must do better!
I experienced the same problem (b).
In my case , it fails when I create a Virtual copy of a Virtual copy using the
keyboard shortcut Ctrl + '
It works if I create the first Virtual copy and then Highlight the original image (1 of x)
and create another virtual copy of the original image.
Does this make sense ...