MythBuntu update-manager comes up in the foreground even when configured to display under MythTV

[tji]

Running Mythbuntu 12.04.2, and I have configured update-manager to display behind the mythfrontend GUI, but it still displays in the foreground.

Since MythTV is primarily controlled via infrared remote and does not have keyboard and mouse connected, it is problematic to dismiss the update manager windows.

lsb_release -rd
Description: Ubuntu 12.04.2 LTS
Release: 12.04

apt-cache policy update-manager
update-manager:
  Installed: 1:0.156.14.11
  Candidate: 1:0.156.14.11
  Version table:
 *** 1:0.156.14.11 0
        500 http://us.archive.ubuntu.com/ubuntu/ precise-updates/main amd64 Packages
        100 /var/lib/dpkg/status
     1:0.156.14.5 0
        500 http://security.ubuntu.com/ubuntu/ precise-security/main amd64 Packages
     1:0.156.14 0
        500 http://us.archive.ubuntu.com/ubuntu/ precise/main amd64 Packages