Tower-3:/home/slush# apt-get -t sarge-backports install openoffice.org
Reading Package Lists... Done
Building Dependency Tree... Done
Some packages could not be installed. This may mean that you have
requested an impossible situation or if you are using the unstable
distribution that some required packages have not yet been created
or been moved out of Incoming.

Since you only requested a single operation it is extremely likely that
the package is simply not installable and a bug report against
that package should be filed.
The following information may help to resolve the situation:

The following packages have unmet dependencies:
  openoffice.org: Depends: openoffice.org-core (= 2.0.3-6~bpo.2) but it is not going to be installed
                  Depends: openoffice.org-writer but it is not going to be installed
                  Depends: openoffice.org-calc but it is not going to be installed
                  Depends: openoffice.org-impress but it is not going to be installed
                  Depends: openoffice.org-draw but it is not going to be installed
                  Depends: openoffice.org-math but it is not going to be installed
                  Depends: openoffice.org-base but it is not going to be installed
                  Depends: openoffice.org-java-common but it is not going to be installed
E: Broken packages
Tower-3:/home/slush# apt-cache policy openoffice.org-core openoffice.org-writer openoffice.org-cacl openoffice.org-impress openoffice.org-draw openoffice.org-math openoffice.org-base openoffice.org-java-common
openoffice.org-core:
  Installed: (none)
  Candidate: 2.0.3-6~bpo.2
  Version Table:
     2.0.3-6~bpo.2 0
          1 http://www.backports.org sarge-backports/contrib Packages
openoffice.org-writer:
  Installed: (none)
  Candidate: 2.0.3-6~bpo.2
  Version Table:
     2.0.3-6~bpo.2 0
          1 http://www.backports.org sarge-backports/contrib Packages
openoffice.org-impress:
  Installed: (none)
  Candidate: 2.0.3-6~bpo.2
  Version Table:
     2.0.3-6~bpo.2 0
          1 http://www.backports.org sarge-backports/contrib Packages
openoffice.org-draw:
  Installed: (none)
  Candidate: 2.0.3-6~bpo.2
  Version Table:
     2.0.3-6~bpo.2 0
          1 http://www.backports.org sarge-backports/contrib Packages
openoffice.org-math:
  Installed: (none)
  Candidate: 2.0.3-6~bpo.2
  Version Table:
     2.0.3-6~bpo.2 0
          1 http://www.backports.org sarge-backports/contrib Packages
openoffice.org-base:
  Installed: (none)
  Candidate: 2.0.3-6~bpo.2
  Version Table:
     2.0.3-6~bpo.2 0
          1 http://www.backports.org sarge-backports/contrib Packages
openoffice.org-java-common:
  Installed: (none)
  Candidate: 2.0.3-6~bpo.2
  Version Table:
     2.0.3-6~bpo.2 0
          1 http://www.backports.org sarge-backports/contrib Packages
W: Unable to locate package openoffice.org-cacl
Tower-3:/home/slush#