system tool backends - error

HI sir while installing packages i was encountered with the problem "system tool backends". Am getting this error everytime by installing packages. With dis error i cant able to install anything.

And another big problem is while installing VLC am getting error as
""The following packages have unmet dependencies:
  vlc: Depends: libavcodec1d (>= 0.cvs20070307) but it is not installable
       Depends: libavformat1d (>= 0.cvs20070307) but it is not installable
       Depends: libavutil1d (>= 0.cvs20070307) but it is not installable
       Depends: vlc-nox (= 0.9.8a+x264snapshot20080928+faad2.6.1+2-1~ppa1) but it is not going to be installed
       Depends: vlc-plugin-pulse but it is not going to be installed
E: Broken packages""
So please help me to get rid of my problem.

Did you modify you /etc/apt/sources.list ?

Can you give us the ouput of
sudo apt-cache policy vlc libavcodec1d

Also try a "sudo apt-get update; sudo apt-get upgrade"

STILL HAVING THE SAME PROBLEM WITH "system tool backends - error" AFTER UPGRADING TOO.

I cant able to install anything with this "system tool backends - error". Please help me to rectify with dis problem

Hello,

I've asked once, I'm asking again now and I'm not going to ask a third time:

Have you modified (read: edited) your /etc/apt/sources.list or any file in /etc/apt/sources.list.d?

Also please give us the output of the command
                            sudo apt-cache policy vlc libavcodec1d

Anyway, your Shift Key seems to be broken. It was turned on all the time as you posted your second last message.

Sorry for the inconvenience. Am getting output in the terminal window for the above mentioned command as

vlc:
  Installed: (none)
  Candidate: 0.9.8a+x264snapshot20080928+faad2.6.1+2-1~ppa1
  Version table:
     0.9.8a+x264snapshot20080928+faad2.6.1+2-1~ppa1 0
        500 http://ppa.launchpad.net hardy/main Packages
     0.9.4-1ubuntu3 0
        500 http://archive.ubuntu.com intrepid/multiverse Packages
     0.8.6-svn20061012.debian-5 0
        500 cdrom://[Debian GNU/Linux 4.0 r0 _Etch_ - Official i386 DVD Binary-1 20070407-11:40] etch/main Packages
libavcodec1d:
  Installed: (none)
  Candidate: (none)
  Version table:

Could you do a sudo apt-cache vlc-plugin-pulse as well?

Either way, you seem to have your sources.list modified. Please remove all additions to that.

For future reference: Please give the output of a command including the prompt like this:
muelli@xbox:~$ apt-cache policy vlc
vlc:
  Installed: 0.9.4-1ubuntu3
  Candidate: 0.9.4-1ubuntu3
  Version table:
 *** 0.9.4-1ubuntu3 0
        500 http://de.archive.ubuntu.com intrepid/multiverse Packages
        100 /var/lib/dpkg/status
     0.8.6.release.e+x264svn20071224+faad2.6.1-0ubuntu3.2 0
        500 http://security.ubuntu.com hardy-security/multiverse Packages
        500 http://de.archive.ubuntu.com hardy-updates/multiverse Packages
     0.8.6.release.e+x264svn20071224+faad2.6.1-0ubuntu3 0
        450 http://de.archive.ubuntu.com hardy/multiverse Packages
muelli@xbox:~$

Concerning your error: Please remove vlc by doing sudo apt-get remove vlc and install it via apt-get install vlc/intrepid

If anything fails, give the exact command and output like I said above.