Select a folder in your catalog and press D. You will see the photos from the folder.
Select a collection in your catalog and press D. You will see the photos from the collection.
Select a parent folder (0 photos displayed/no photos from subfolders enabled) and press D. You will NOT see the photos from the folder as it contains 0 photos.
thanks for your time and help
I opened the same collection today and it's working, it's really a bug from LR4
I guess I have to keep for now LR3 inot my hard drive, time adobe will fixe it
have a great week end
Download 4.1 RC and it didn't fix the problem. 20-25% of photos are not shown, i.e. black. Disappointed