Original User: Ken_Galliher
I'm not 100% sure this will work for you, but I just tried it and I'm able to preview the features in ArcCatalog.
1. Create a new file geodatabase, name it whatever.
2. In windows explorer, navigate to the 9.3.1 file geodatabase folder and select everything except the "sr.lock" file and copy.
3. Navigate to the new file geodatabase and paste everything into that folder. There are index files and other misc. files that you will choose to "Copy and replace". If you get to a point where it tells you that something is open and can't be pasted, choose ignore or skip.
4. Let me know what happens.