What about just upgrading an LR3 catalog with LR4?
Sorry I wasn't clear in my post. I did that. Problem started there. Any ideas?
I have exactly the same problem. All my collections are missing.
Interestingly, I have figured out how to transfer the smart collections....
1 - go back to LR3 and right click on a smart collection
2- click 'export smart collection settiings' and save to desktop
3- go to LR4 and create a similarly named colelction.
4 - right click on the new collection and choose "import Smart Collection Settings" and import the file from your desktop.
HOWEVER - I cant find any way of recreating the collections that are manually created. This is also a HUGE problem for me as I've spend Hhours and hours creating colelctions and collection sets for clients, books, calendars etc etc etc !!
Any news on this? Did you sort this out?
I haven't heard many reports about similar probles other than in this thread.
By the way, those missing collections... were they populated with any images in LR3?
Are these collections and sets in Publish services or under the ordinary Collections panel?