Everytime I try to edit a release this happens:
Is there something going on or is it just me?
It's not just you. The beta site won't even load, just gives a Bad Gateway error. It started sometime in the last ~8 hours, so I'm sure they'll get it fixed ASAP.
There's a ticket here: http://tickets.metabrainz.org/browse/MBS-9131
Looks like we're back in business!