maemo.org - Talk - Easy Debian problem

Hi
While installing g++ my system crashed. fortunately I had no corrupt library problem but indeed had /var/lib/dpkg/updates/0006 parse error.
I tried to remove the files as advised somewhere. I had an Stale NFS lock. As advised somewhere on talk.maemo.org, I moved /var/lib/dpkg to /var/lib/dpkg.old, dpkg.old to /home, removed available and stuff from updates and made /var/lib/dpkg

then dpkg --clear-avail, apt-get clean all

And now I've got an error:

Code:

E: The value 'testing' is invalid for APT::Default-Release as such a release is not available in the sources.

I've got default sources, even tried removing packages.tspre (unable to get data from this repo), tried apt-get update and still nothing

How can I fix it? I'd like to avoid reinstalling the image...