Please remove zh and ja from RTL list. These are not RTL languages.

mediagoblin/tools/translate.py

Not sure what's going on here:

class NonceTimestamp(Base):
    """
        A place the timestamp and nonce can be stored - this is for OAuth1
    """
    __tablename__ = "core__nonce_timestamps"

    nonce = Column(Unicode, nullable=False, primary_key=True)
    timestamp = Column(DateTime, nullable=False, primary_key=True)

but by definition they can't both be primary keys.

It would be really awesome if you were able to easily export all your data from Mediagoblin and have all the media you uploaded put into a tar/zip/whatever that you can download. It would also be useful if some of the user data (name, description, etc.) was exported so if someone was going to deploy their own Mediagoblin instance or move from an existing deployment they could just import the tar/zip/etc. file.