Comment 3 for bug 982473

Thanks for your report.

From the logs the error is :
Apr 15 17:25:32 ubuntu ubiquity: Setting up update-notifier-common (0.119ubuntu7) ...
Apr 15 17:25:41 ubuntu ubiquity:
Apr 15 17:25:41 ubuntu ubiquity: Configuration file `/etc/cron.daily/update-notifier-common' (actually `/target/etc/cron.daily/update-notifier-common')
Apr 15 17:25:41 ubuntu ubiquity: ==> File on system created by you or by a script.
Apr 15 17:25:41 ubuntu ubiquity: ==> File also in package provided by package maintainer.
Apr 15 17:25:41 ubuntu ubiquity: What would you like to do about it ? Your options are:
Apr 15 17:25:41 ubuntu ubiquity: Y or I : install the package maintainer's version
Apr 15 17:25:41 ubuntu ubiquity: N or O : keep your currently-installed version
Apr 15 17:25:41 ubuntu ubiquity: D : show the differences between the versions
Apr 15 17:25:41 ubuntu ubiquity: Z : start a shell to examine the situation
Apr 15 17:25:41 ubuntu ubiquity: The default action is to keep your current version.
Apr 15 17:25:41 ubuntu ubiquity: *** update-notifier-common (Y/I/N/O/D/Z) [default=N] ? dpkg: error processing update-notifier-common (--configure):
Apr 15 17:25:41 ubuntu ubiquity: EOF on stdin at conffile prompt

Could you please describe the setup of your system before you installed Precise Beta 2 and the steps you follow to install Beta 2 and get this error ?

I also noticed from the logs that a custom source.list and a ppa are enable:
http://apt.spideroak.com
http://ppa.launchpad.net precise

And this errors
Apr 15 13:30:19 ubuntu ubiquity: ERROR: '/target//@' exists
Apr 15 13:30:49 ubuntu ubiquity: ERROR: '/target/home/@home' exists