Steps to reproduce:
1. Create custom fields for Documents and Media Folder and Documents and Media Document. (Control Panel > Custom Fields)
2. On a new page, add a Documents and Media portlet and create documents and folders with the custom fields.
3. Export the site .lar file.
4. Shut down app server, clear database and home, and restart app server.
5. Import the .lar file.
6. Assert that the custom fields were not imported by editing the created documents and folders.
Custom fields display when a .lar file is imported
Custom fields do not display when the .lar file is imported.