package openjdk-7-jre-headless 7u25-2.3.10-1ubuntu0.12.04.2 failed to install/upgrade: conffile './etc/java-7-openjdk/swing.properties' is not in sync with other instances of the same package

[Kamil Slowikowski]

lsb_release -rd
Description: Ubuntu 12.04.3 LTS
Release: 12.04

ProblemType: Package
DistroRelease: Ubuntu 12.04
Package: openjdk-7-jre-headless 7u25-2.3.10-1ubuntu0.12.04.2
ProcVersionSignature: Ubuntu 3.8.0-33.48~precise1-generic 3.8.13.11
Uname: Linux 3.8.0-33-generic x86_64
NonfreeKernelModules: nvidia
ApportVersion: 2.0.1-0ubuntu17.6
Architecture: amd64
Date: Sun Nov 17 10:52:17 2013
DuplicateSignature: package:openjdk-7-jre-headless:7u25-2.3.10-1ubuntu0.12.04.2:conffile './etc/java-7-openjdk/swing.properties' is not in sync with other instances of the same package
ErrorMessage: conffile './etc/java-7-openjdk/swing.properties' is not in sync with other instances of the same package
InstallationMedia: Ubuntu 12.04.3 LTS "Precise Pangolin" - Release amd64 (20130820.1)
MarkForUpload: True
SourcePackage: openjdk-7
Title: package openjdk-7-jre-headless 7u25-2.3.10-1ubuntu0.12.04.2 failed to install/upgrade: conffile './etc/java-7-openjdk/swing.properties' is not in sync with other instances of the same package
UpgradeStatus: No upgrade log present (probably fresh install)

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.

[dnmvisser (dnmvisser)]

My java install is also b0rked by this, see attached upgrade log.

[dnmvisser (dnmvisser)]

I removed all of the opendk-7 stuff and installed the openjdk-6 equivalents.
My app (Wowza streaming media server) was able to use that fine.