The following packages will be upgraded:
  jenkins
1 upgraded, 0 newly installed, 0 to remove and 0 not upgraded.
Need to get 59.0MB of archives.
After this operation, 6,144B disk space will be freed.
Get:1 http://pkg.jenkins-ci.org/debian/ binary/ jenkins 1.595 [59.0MB]
Fetched 59.0MB in 16s (3,580kB/s)
(Reading database ... 53065 files and directories currently installed.)
Preparing to replace jenkins 1.594 (using .../archives/jenkins_1.595_all.deb) ...
 * Stopping Jenkins Continuous Integration Server jenkins                                                                                                [ OK ]
Unpacking replacement jenkins ...
dpkg-deb: file `/var/cache/apt/archives/jenkins_1.595_all.deb' contains ununderstood data member data.tar.xz     , giving up
dpkg: error processing /var/cache/apt/archives/jenkins_1.595_all.deb (--unpack):
 subprocess dpkg-deb --fsys-tarfile returned error exit status 2
 * Starting Jenkins Continuous Integration Server jenkins                                                                                                [ OK ]
Errors were encountered while processing:
 /var/cache/apt/archives/jenkins_1.595_all.deb
E: Sub-process /usr/bin/dpkg returned an error code (1)
Reading package lists... Done
Building dependency tree
Reading state information... Done
Reading package lists... Done
Building dependency tree
Reading state information... Done
0 upgraded, 0 newly installed, 0 to remove and 1 not upgraded.
$ uname -a
Linux jinahya.com 2.6.38-13-generic-pae #57~lucid1-Ubuntu SMP Tue Mar 6 20:44:35 UTC 2012 i686 GNU/Linux
$ file /sbin/init
/sbin/init: ELF 32-bit LSB shared object, Intel 80386, version 1 (SYSV), dynamically linked (uses shared libs), for GNU/Linux 2.6.15, stripped
$