Dietrich Floeter wrote:
In my case, the images are still on the hard drive and safe. LR no longer shows the images in the catalog but remembers that it once imported them. The only way to see them in LR is to reimport with the don't reimport suspected duplicates box unchecked and all is well. Any edits and ratings are gone but at least I an work with them.
Have you made sure you have All Photographs checked in the Catalog Panel on the left. Have you turned off all of your filters (Ctrl-L)? If Lightroom thinks you have imported the photos, then you have imported them and Lightroom remembers them and the work you did on them, and some selection you have made somewhere is preventing you from seeing them.
By the way, this sure sounds like a different problem than the one the original poster mentioned.