Comment 1 for bug 601011

I can confirm this behaviour:

spriggsj@spriggsj-laptop:~$ lsb_release -a
No LSB modules are available.
Distributor ID: Ubuntu
Description: Ubuntu maverick (development branch)
Release: 10.10
Codename: maverick
spriggsj@spriggsj-laptop:~$ apt-cache policy unity
unity:
  Installed: 0.2.14-0ubuntu1
  Candidate: 0.2.14-0ubuntu1
  Version table:
 *** 0.2.14-0ubuntu1 0
        500 http://gb.archive.ubuntu.com/ubuntu/ maverick/main Packages
        100 /var/lib/dpkg/status

In addition, an example of one program which duplicates this bug is the current version of Firefox

spriggsj@spriggsj-laptop:~$ apt-cache policy firefox
firefox:
  Installed: 3.6.6+nobinonly-0ubuntu1
  Candidate: 3.6.6+nobinonly-0ubuntu1
  Version table:
 *** 3.6.6+nobinonly-0ubuntu1 0
        500 http://gb.archive.ubuntu.com/ubuntu/ maverick/main Packages
        100 /var/lib/dpkg/status