I tried to contribute a change to 5-051561-002304, but the program does not work correctly with the Opera browser that I use (I can't stand Windblows Exploder).  It starts the browser OK, but a new tab with the contribution is not opened. I have contributed in the past, so I do not know why it doesn't work now.

I can't find a way to get the website to let me edit the contribution.

It is a very minor change.  The Blu-ray region code is currently marked as "B" when in reality it is "ABC".  I have the disc and it plays just fine in my "A" only Blu-ray standalone player.  I don't know why it was ever submitted as "B" in the first place, considering the disc is not marked as such in the first place.  The BBC tends to not region code their Doctor Who Blu-ray releases.