[chaley]

I got the metadata.db you sent, and the mystery is not solved. It works perfectly for me and the db has all the info in the form I would expect. See the attached screenshots. The first is the library view where you can see the values in the tag browser. The second is the edit metadata window showing the values as they were entered. The third is the column definition.

I note that the genre column is empty; no books have anything in it. Is that the column you are changing when you have the problem? In any event, I couldn't find an example of the problem in that db.