edgy kde-devel broken dependencies

[Rich Lott]

Can anyone help with the following?

===== error message on "sudo apt-get install kde-devel" =====

Some packages could not be installed. This may mean that you have
requested an impossible situation or if you are using the unstable
distribution that some required packages have not yet been created
or been moved out of Incoming.

Since you only requested a single operation it is extremely likely that
the package is simply not installable and a bug report against
that package should be filed.
The following information may help to resolve the situation:

The following packages have unmet dependencies.
  kde-devel: Depends: kdesdk (>= 4:3.4.3) but it is not going to be installed
             Depends: libartsc0-dev (>= 1.4.2) but it is not going to be 
installed
             Depends: libarts1-dev (>= 1.4.2) but it is not going to be 
installed
             Depends: kdelibs4-dev (>= 4:3.4.3) but it is not going to be 
installed
             Depends: kdebase-dev (>= 4:3.4.3) but it is not going to be 
installed
             Depends: libkonq4-dev (>= 4:3.4.3) but it is not going to be 
installed
E: Broken packages

===== my sources.list file =====

egrep -v '^#|^$' /etc/apt/sources.list
deb-src http://gb.archive.ubuntu.com/ubuntu/ edgy restricted main multiverse 
universe
deb-src http://gb.archive.ubuntu.com/ubuntu/ edgy-updates restricted main 
multiverse universe
deb http://security.ubuntu.com/ubuntu/ edgy-security main restricted
deb-src http://security.ubuntu.com/ubuntu/ edgy-security restricted main 
multiverse universe
deb http://gb.archive.ubuntu.com/ubuntu/ edgy main restricted universe
deb http://gb.archive.ubuntu.com/ubuntu/ edgy-updates main restricted
deb http://security.ubuntu.com/ubuntu/ edgy-security main restricted
deb http://gb.archive.ubuntu.com/ubuntu/ edgy multiverse
deb http://gb.archive.ubuntu.com/ubuntu/ edgy-updates universe multiverse
deb http://security.ubuntu.com/ubuntu/ edgy-security universe multiverse
deb http://www.kubuntu.org/packages/amarok-144 edgy main
deb http://packages.freecontrib.org/plf edgy-plf free non-free
deb-src http://web.inf.tu-dresden.de/~cw183155/smoothslidesaver source/
deb http://archive.ubuntu.com/ubuntu/ edgy-backports restricted main 
multiverse universe
deb-src http://archive.ubuntu.com/ubuntu/ edgy-backports restricted main 
multiverse universe #Added by software-properties
deb http://archive.ubuntu.com/ubuntu/ edgy-updates restricted main multiverse