E:Type '--10:21:13--' is not known on line 1 in source list /etc/apt/sources.list.d/medibuntu.list, E:The list of sources could not be read.'

This happened when I tried to install files from Medibuntu to play DVD's the error does not allow me to install the new security up dates - please advise.
Rajeev

ProblemType: Bug
Architecture: i386
Date: Fri Feb 29 10:30:24 2008
DistroRelease: Ubuntu 7.04
ExecutablePath: /usr/bin/yelp
Package: yelp 2.18.1-0ubuntu2
PackageArchitecture: i386
ProcCmdline: yelp
ProcCwd: /home/rajeev
ProcEnviron:
 PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/bin/X11:/usr/games
 LANG=en_US.UTF-8
 SHELL=/bin/bash
SourcePackage: yelp
Uname: Linux rajeev-desktop 2.6.20-16-generic #2 SMP Tue Feb 12 05:41:34 UTC 2008 i686 GNU/Linux