Version: PasswordSafeSWT 0.8-beta4 (452)
Importing from a plain text file (which was created using Export) will not import the entries, and will not allow you to save the database.
Steps to reproduce:
Open an existing database. Export to a plain text, tab-delimited file.
Create a new database. Import the file you just created. No entries show up.
Add a new entry. Click the "Save" button. It will ask for a file name, give it a name and press enter. The file does not get created.