Comment 46 for bug 149106

For all those who say they cant upgrade to the new version (eg dominik & Mircea), just be patient, It'll be uploaded to your mirror soon. Probably within a day at the max. If you're really desperate, I can confirm that the UK mirror (http://gb.archive.ubuntu.com/ubuntu) has the upgrade on it.
alec@Jupiter:~$ apt-cache policy libcupsys2
libcupsys2:
  Installed: 1.3.2-1ubuntu4
  Candidate: 1.3.2-1ubuntu5
  Version table:
     1.3.2-1ubuntu5 0
        500 http://gb.archive.ubuntu.com gutsy/main Packages
 *** 1.3.2-1ubuntu4 0
        100 /var/lib/dpkg/status
alec@Jupiter:~$