I keep separate catalog for each photo shoot. This was a very large collection, more than 4,000 images. After culling and processing, I had about 2,000 images marked as "rejected," leaving 2,034 images marked as "flagged" or "unflagged." After deleting all the rejected images from the collection and the hard drive, I still had 2,034 images remaining. Of those images, 1,269 were marked as "flagged," while the remaining were "unflagged." After filtering all the flagged images for export as jpeg images, I started the export process. The export worked fine, but all the "flagged" images were now marked as "unflagged." It could have been worse, everything else in the catalog looks fine, and all the raw files are still there, but now I have to remark 1,269 images, something I am not looking forward to!