I was doing nothing... this error just showed up. Just after login.
ProblemType: Package
DistroRelease: Ubuntu 12.04
Package: openjdk-6-jre-headless 6b24-1.11.1-3ubuntu3
ProcVersionSignature: Ubuntu 3.2.0-17.27-generic 3.2.6
Uname: Linux 3.2.0-17-generic i686
ApportVersion: 1.94-0ubuntu1
Architecture: i386
Date: Sun Mar 4 13:58:03 2012
DuplicateSignature:
Unpacking replacement openjdk-6-jre-headless ...
dpkg-deb (subprocess): data: internal gzip read error: '<fd:4>: invalid distance code'
dpkg-deb: error: subprocess <decompress> returned error exit status 2
dpkg: error processing /var/cache/apt/archives/openjdk-6-jre-headless_6b24-1.11.1-3ubuntu3_i386.deb (--unpack):
short read on buffer copy for backend dpkg-deb during `./usr/lib/jvm/java-6-openjdk-i386/jre/lib/rt.jar'
ErrorMessage: short read on buffer copy for backend dpkg-deb during `./usr/lib/jvm/java-6-openjdk-i386/jre/lib/rt.jar'
InstallationMedia: Ubuntu 11.10 "Oneiric Ocelot" - Release i386 (20111012)
SourcePackage: openjdk-6
Title: package openjdk-6-jre-headless 6b24-1.11.1-3ubuntu3 failed to install/upgrade: short read on buffer copy for backend dpkg-deb during `./usr/lib/jvm/java-6-openjdk-i386/jre/lib/rt.jar'
UpgradeStatus: Upgraded to precise on 2012-02-12 (20 days ago)
Thank you for taking the time to report this bug and helping to make Ubuntu better. It seems that there was an error on your system when trying to install a particular package. Please execute the following command, as it will clear your package cache, in a terminal:
sudo apt-get clean
Then try performing the update again. This will likely resolve your issue, but the failure could be caused by filesystem or memory corruption. So please also run a fsck on your filesystem(s) and a memory test. Thanks in advance!
[This is an automated message. I apologize if it reached you inappropriately; please just reply to this message indicating so.]