Did you move the clips? Did you have them on an external drive that got assigned a new drive letter when you re-attached it? Did you copy the entire folder structure from the card to your hard drive and then use Pr's Media Browser to import them?
Another consideration: check your new sequence presets. Are they all there or are some missing?
I see this happen on occasion. I'm always able to get things back to normal by opening an empty PP project. From there I delete the Media Cache Database under Preferences>Media. Then I close PP and delete the actual Media Cache files using Windows Explorer.
Upon reopening the project, the Cache files need to be rebuilt, but they all work after that.
Thanks. I actually got the clips back already by deleting them from the bin, then deleting the cache files in Finder. If it happens again, I'll try just deleting the cache files.
Have you noticed any pattern to what causes this? Is it a known bug?
Seems to happen randomly on ocasion.