Comment 8 for bug 1320438

I do not see unity (7.2.2+14.04.20140714-0ubuntu1) neither in trusty-proposed nor in trusty.

$ grep proposed /etc/apt/sources.list
deb http://cz.archive.ubuntu.com/ubuntu/ trusty-proposed universe restricted multiverse main # archive.ubuntu.com tested too

$ sudo apt-get update
...
Reading package lists... Done

$ sudo apt-cache policy unity
unity:
  Installed: 7.2.1+14.04.20140513-0ubuntu2
  Candidate: 7.2.1+14.04.20140513-0ubuntu2
  Version table:
 *** 7.2.1+14.04.20140513-0ubuntu2 0
        500 http://cz.archive.ubuntu.com/ubuntu/ trusty-updates/main amd64 Packages
        100 /var/lib/dpkg/status
     7.2.0+14.04.20140423-0ubuntu1.2 0
        500 http://security.ubuntu.com/ubuntu/ trusty-security/main amd64 Packages
     7.2.0+14.04.20140416-0ubuntu1 0
        500 http://cz.archive.ubuntu.com/ubuntu/ trusty/main amd64 Packages

$ sudo apt-get -sV install unity/trusty-proposed
Reading package lists... Done
Building dependency tree
Reading state information... Done
E: Release 'trusty-proposed' for 'unity' was not found