Moving local content that is already indexed creates duplicate entries.

To reproduce this issue do the following:

1. Place files in a local media source and kick off scanning.
2. Allow boxee to index the local media
3. Move the newly indexed files into a sub-folder.
(In my case I was cleaning up some files and moving them into folders like Season1, Season2, etc)
4. Kick off scanning.

Results:
When you pick the show you now will see two copies.
First copy: This is your originally indexed show. Since the file has moved it will no longer play. This copy should be removed by boxee from it's internal database.
Second copy: This is your moved copy. This one will play.

I am also attaching two screenshots showing the duplicate entries.