I haven't seen anyone else with the same problem so don't know what might be wrong here.
Running a 27inch iMac 2.8ghz i7 with OSX 10.6.8. The system seems perfectly stable and I have had no problems with any other software. But there is a problem with LR4.
I duplicated my LR3 catalog, opened it in LR4 and upgraded. Everything appears to work perfectly normally and is stable. I left the catalog open for day or so and could work on it without any problems. But the problem arises when I close LR4 and restart. The catalog opens perfectly happily but I am immediately confronted with the import dialog - i.e. a message in the centre of a blank screen saying "click import button to begin...". There is no memory card attached to the computer and in any event I have disabled the option to show the import dialog when a memory card is detected.
All the photographs are listed as being in the catalog under "All Photographs" but if I click on the "All Photographs" button I get the import dialog and no photographs load. I can click on any collection or on any folder and the photographs within the collection/folder load perfectly normally. BUT if I click on the main folder containing all the sub-folders with my photographs then, even though LR4 says that there are 25,000 photos in the main folder I get an error message saying that there are no photos in the folder. The Show Photos in subfolders option is active.
So whilst I can work on the photos in any sub-folder or collection I am unable to access all the photos.
Any ideas what might be going on?
Thanks