Apport is a debugging tool that automatically generates crash reports.
In the final Ubuntu 12.04 release, Apport is enabled by default (unlike
in the previous Ubuntu versions) and at least on my system, I keep
getting "Sorry, Ubuntu 12.04 has experienced an internal error" popups, which can't be reported, a few times a day (Apport bug already reported).
To get rid of
these annoying Apport popups, you can disable Apport, especially since
most of the time there are no visible errors / crashes anyway. Sure,
this won't solve the actual errors, but at least you won't get those
frequent Apport "internal system error" dialogs anymore.
To disable Apport, you need to edit "/etc/default/apport" with a text editor such as Gedit (as root):
gksu gedit /etc/default/apport
You can always re-enable it later on
if you want, by changing "enabled" from "0" back to "1", or you can
enable Apport temporarily, using the following command:
sudo service apport start force_start=1