bzr missing gives confusing 'up to date' message

Using current bzr.dev, 'bzr missing --this OTHER-REPO' says "This branch is up to date", when it should say "This branch has no new revisions".

To repeat:

cd /tmp
mkdir a
cd a
bzr init
bzr branch . ../b
echo foo > a_file.txt
bzr add a_file.txt
bzr commit -m 'change'
bzr missing --other ../b
cd ../b
bzr missing --this ../a
bzr missing

Output, and suggestions for correct wording:

$ mkdir a
$ cd a
$ bzr init
$ bzr branch . ../b
Branched 0 revision(s).
$ echo foo > a_file.txt
$ bzr add a_file.txt
added a_file.txt
$ bzr commit -m 'change'
Committing to: /tmp/other-bug/a/
added a_file.txt
Committed revision 1.
$ bzr missing --other ../b
Other branch is up to date.

### Oops, actually *this* branch is up-to-date, but the other branch
### is missing a revision.
### Suggested wording: "This branch is up to date." Or, "Other branch
### has no new revisions."

$ cd ../b
$ bzr missing --this ../a
This branch is up to date.

### Oops, actually this branch is missing a revision, it's the *other*
### branch which is up-to-date.
### Suggested wording: "Other branch is up to date." Or, "This branch
### has no new revisions."

$ bzr missing
Using last location: /tmp/other-bug/a/
You are missing 1 revision(s):
------------------------------------------------------------
revno: 1
committer: Carl Committer <email address hidden>
branch nick: a
timestamp: Sun 2008-07-20 11:15:12 -0600
message:
  change

### Yes, this is correct. It would be more professional to
### say "This branch is missing" instead of "You are missing".

$ bzr version
Bazaar (bzr) 1.6b4
  from bzr checkout /home/ccomm/lib/bzr.dev
    revision: 3565
    revid: <email address hidden>
    branch nick: bzr.dev
  Python interpreter: /usr/bin/python 2.5.2
  Python standard library: /usr/lib/python2.5
  bzrlib: /home/ccomm/lib/bzr.dev/bzrlib
  Bazaar configuration: /home/ccomm/.bazaar
  Bazaar log file: /home/ccomm/.bzr.log