The mechanics of release linking works. You can select one or more releases, or you can select "All Releases" when the album contains music that is found on all releases. You can even select "All Releases" and another release, if the album contains music from all releases
and music from a specific release.
Albums appear on the release pages now. I've separated the discography into 2 sections, one for albums that contain music specifically for that release, and one for albums that are common to all releases. Both of these are different than what you get up on the title product page.
http://vgmdb.net/db/release.php?id=1161
http://vgmdb.net/db/release.php?id=87
You can follow the links from the product pages to the release pages now, but only for releases that have albums linked to them. (I didn't want to generate a bunch of new pages with no useful info.)
Next, I need to work on how this stuff displays on the album page.