These are similar bug reports:
https://bugs.launchpad.net/ubuntu/+bug/346289
https://bugs.launchpad.net/ubuntu/+bug/347065
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https://bugs.launchpad.net/bugs/365396
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** Attachment added: "Dependencies.txt"
http://launchpadlibrarian.net/25871672/Dependencies.txt
** Attachment added: "ExtensionSummary.txt"
http://launchpadlibrarian.net/25871673/ExtensionSummary.txt
** Attachment added: "profiles.ini.txt"
http://launchpadlibrarian.net/25871674/profiles