How to delete databases from Ubuntu One?

How can I delete databases from Ubuntu One? I want to do that because I deleted and re-created databases on my local couchdb instance, and now replication fails with the following message:

2010-10-10 15:16:10,832 ERROR can't replicate 'u/039/94e/46881/gwibber_messages' 'http://localhost:50014/' <== {'source': {'url': 'https://couchdb.one.ubuntu.com/u%2F039%2F94e%2F46881%2Fgwibber_messages', 'auth': {'oauth': {dbus.String(u'consumer_secret'): 'HiddenHiddenHiddenHiddenHidden', dbus.String(u'token'): dbus.String(u'Hidden'), dbus.String(u'consumer_key'): dbus.String(u'Hidden'), dbus.String(u'name'): dbus.String(u'Hidden'), dbus.String(u'token_secret'): 'HiddenHiddenHiddenHiddenHiddenHiddenHiddenHiddenHi'}}}, 'target': 'gwibber_messages'}
Traceback (most recent call last):
  File "/usr/lib/python2.6/dist-packages/desktopcouch/pair/couchdb_pairing/couchdb_io.py", line 288, in replicate
    content=record)
  File "/usr/lib/pymodules/python2.6/couchdb/client.py", line 985, in post
    **params)
  File "/usr/lib/pymodules/python2.6/couchdb/client.py", line 1035, in _request
    raise ServerError((status_code, error))
ServerError: (500, ('json_encode', '{bad_term,<0.3858.0>}'))

Thanks for your help.
Philipp