Well this appear on lates lubuntu, and on latest Ubuntu. After a time this error is showing up on monitor.
So how to fix this ?
Sorry, Ubuntu 12.04 has experienced an internal error
This error is reported by apport service on ubuntu.
So to disable it just edit /etc/default/apport and modify the value of enable from 1 to 0
sudo vi /etc/default/apport
After modification the file should look something like this
# set this to 0 to disable apport, or to 1 to enable it
# you can temporarily override this with
# sudo service apport start force_start=1
enabled=0