Comment 4 for bug 374019

Ok so I have a fix that works, which is based on another branch that's currently landing which is a brand new ftp server based on twisted.

The output you get from dput looks like this:

Uploading to dogfood (via ftp to dogfood.launchpad.net):
  Uploading hello_2.5-1ubuntu1.dsc: done.
  Uploading hello_2.5-1ubuntu1.diff.gz: done.
  Uploading hello_2.5-1ubuntu1_source.changes: 1k/2k550 ('Changes file must be signed with a valid GPG signature: Verification failed 3 times: ["(7, 8, u\'Bad signature\')", "(7, 8, u\'Bad signature\')", "(7, 8, u\'Bad signature\')"] ',): Permission denied.
Note: This error might indicate a problem with your passive_ftp setting.
      Please consult dput.cf(5) for details on this configuration option.

which should be enough for anyone to realise they've cocked up the signatures.