Soback to repairing your repository list, which seems to be corrupted.
One of the reasons might be the usage of the built-in Hildon-Application-Manager, aka. HAM, mixed with the pure apt-get from X-Terminal. The HAM application never played nice with manual installs.

Please edit your repositories only in the HAM section to manage repositories. Check those repositories for being typed correctly and being enabled (NOTE: The nokia repository's names are translated into your localized settings):

Catalog name: Nokia Applications
Web address: https://downloads.maemo.nokia.com/fremantle/ssu/apps/
Distribution: ./
Components:

Catalog name: Nokia System Software Updates
Web address: http://downloads.maemo.nokia.com/fremantle/ssu/mr0
Distribution: ./
Components:

Catalog name: maemo.org
Web address: http://repository.maemo.org/extras/
Distribution: fremantle-1.3
Components: free non-free

For qtedger to work you need the CSSU installed,

Catalog name: Community SSU
Web address: http://repository.maemo.org/community/
Distribution: fremantle
Components: free non-free

but you could uninstall that to skip setting up CSSU for your Nitdroid intentions. There might be also an OVI repository. Do you also have extras-devel repo enabled???

Catalog name: maemo.org extras-devel
Web address: http://repository.maemo.org/extras-devel/
Distribution: fremantle
Components: free non-free

HAM will update the repositories, you have to be patient...
Reboot to kill all the HAM actions after the update of the repositories, AFTER!!!

Now try to correct the package management systemPlease post the output of all the commands here if errors occur, that are not finally after running all the commands, are resolved.