Comment 5 for bug 501448

I am unable to reproduce this with the following info:
gnomefreak@Development:~$ apt-cache policy sunbird lightning-extension thunderbird libstdc++6 libstdc++5
sunbird:
  Installed: 0.9+nobinonly-0ubuntu3
  Candidate: 0.9+nobinonly-0ubuntu3
  Version table:
 *** 0.9+nobinonly-0ubuntu3 0
        500 http://gb.archive.ubuntu.com lucid/universe Packages
        100 /var/lib/dpkg/status
lightning-extension:
  Installed: 0.9+nobinonly-0ubuntu3
  Candidate: 0.9+nobinonly-0ubuntu3
  Version table:
 *** 0.9+nobinonly-0ubuntu3 0
        500 http://gb.archive.ubuntu.com lucid/universe Packages
        100 /var/lib/dpkg/status
thunderbird:
  Installed: 2.0.0.23+build1+nobinonly-0ubuntu1
  Candidate: 2.0.0.23+build1+nobinonly-0ubuntu1
  Version table:
 *** 2.0.0.23+build1+nobinonly-0ubuntu1 0
        500 http://gb.archive.ubuntu.com lucid/main Packages
        100 /var/lib/dpkg/status
libstdc++6:
  Installed: 4.4.2-5ubuntu1
  Candidate: 4.4.2-9ubuntu3
  Version table:
     4.4.2-9ubuntu3 0
        500 http://gb.archive.ubuntu.com lucid/main Packages
 *** 4.4.2-5ubuntu1 0
        100 /var/lib/dpkg/status
W: Unable to locate package libstdc++5

this is using Karmic and Lucid