Comment 7 for bug 1066157

* enable proposed repository & install unity package.

$ LANG=C apt-cache policy unity libunity-core-6.0-9 unity-services
unity:
  Installed: 7.2.4+14.04.20150316-0ubuntu1
  Candidate: 7.2.4+14.04.20150316-0ubuntu1
  Version table:
 *** 7.2.4+14.04.20150316-0ubuntu1 0
        400 http://ftp.jaist.ac.jp/pub/Linux/ubuntu/ trusty-proposed/main i386 Packages
        100 /var/lib/dpkg/status
     7.2.4+14.04.20141217-0ubuntu1 0
        500 http://ftp.jaist.ac.jp/pub/Linux/ubuntu/ trusty-updates/main i386 Packages
     7.2.2+14.04.20140714-0ubuntu1.1 0
        500 http://ftp.jaist.ac.jp/pub/Linux/ubuntu/ trusty-security/main i386 Packages
     7.2.0+14.04.20140416-0ubuntu1 0
        500 http://ftp.jaist.ac.jp/pub/Linux/ubuntu/ trusty/main i386 Packages

libunity-core-6.0-9:
  Installed: 7.2.4+14.04.20150316-0ubuntu1
  Candidate: 7.2.4+14.04.20150316-0ubuntu1
  Version table:
 *** 7.2.4+14.04.20150316-0ubuntu1 0
        400 http://ftp.jaist.ac.jp/pub/Linux/ubuntu/ trusty-proposed/main i386 Packages
        100 /var/lib/dpkg/status
     7.2.4+14.04.20141217-0ubuntu1 0
        500 http://ftp.jaist.ac.jp/pub/Linux/ubuntu/ trusty-updates/main i386 Packages
     7.2.2+14.04.20140714-0ubuntu1.1 0
        500 http://ftp.jaist.ac.jp/pub/Linux/ubuntu/ trusty-security/main i386 Packages
     7.2.0+14.04.20140416-0ubuntu1 0
        500 http://ftp.jaist.ac.jp/pub/Linux/ubuntu/ trusty/main i386 Packages

unity-services:
  Installed: 7.2.4+14.04.20150316-0ubuntu1
  Candidate: 7.2.4+14.04.20150316-0ubuntu1
  Version table:
 *** 7.2.4+14.04.20150316-0ubuntu1 0
        400 http://ftp.jaist.ac.jp/pub/Linux/ubuntu/ trusty-proposed/main i386 Packages
        100 /var/lib/dpkg/status
     7.2.4+14.04.20141217-0ubuntu1 0
        500 http://ftp.jaist.ac.jp/pub/Linux/ubuntu/ trusty-updates/main i386 Packages
     7.2.2+14.04.20140714-0ubuntu1.1 0
        500 http://ftp.jaist.ac.jp/pub/Linux/ubuntu/ trusty-security/main i386 Packages
     7.2.0+14.04.20140416-0ubuntu1 0
        500 http://ftp.jaist.ac.jp/pub/Linux/ubuntu/ trusty/main i386 Packages

[CHECK: Test Case]
Change locale to english by language selector.
(1) Enable Screen Reader (System Settings > Universal Access > Screen Reader)
(2) Press Super + A to bring up the Applications lens of the Dash
(3) Navigate displayed content
(4) Choose an application for preview
(5) Press Esc until the Dash is closed, repeat steps 2 to 4

---> You should hear the application description and preview description.
Read repeatedly and may not read.
Is it a problem of the operation speed? or hardware spec?