Comment 5 for bug 804548

Verified with the landscape-client-11.07.1.1-0ubuntu0.10.04.0 package in lucid-proposed:

root@ls1-lucid:/etc/apt# apt-cache policy landscape-client
landscape-client:
  Installed: 11.07.1.1-0ubuntu0.10.04.0
  Candidate: 11.07.1.1-0ubuntu0.10.04.0
  Version table:
 *** 11.07.1.1-0ubuntu0.10.04.0 0
        500 http://us.archive.ubuntu.com/ubuntu/ lucid-proposed/main Packages
        100 /var/lib/dpkg/status
     11.02-0ubuntu0.10.04.1 0
        500 http://security.ubuntu.com/ubuntu/ lucid-updates/main Packages
     1.5.0.1-0ubuntu0.10.04.0 0
        500 http://us.archive.ubuntu.com/ubuntu/ lucid/main Packages

Permissions mangled to be root:landscape 0755 before, and remained like that after:

# l /etc/apt/sources.list
-rwxr-xr-x 1 root landscape 1.2K 2011-07-27 21:44 /etc/apt/sources.list