Mine

root@pvr:/usr/src/mythtv-0.19# cat /etc/apt/sources.list
## The following lines are user added
deb http://ubuntu.systemadministrator.org dapper mythtv
deb-src http://ubuntu.systemadministrator.org dapper mythtv

## Start default list

## Major bug fix updates produced after the final release of the
## distribution.
deb http://us.archive.ubuntu.com/ubuntu/ dapper-updates main restricted
deb-src http://us.archive.ubuntu.com/ubuntu/ dapper-updates main restricted