@unexpected,

I guess that this my-maemo.org repository is causing the problem because it seems to have priority over maemo-extras (probably because apt-get thinks that 0.4.6-7maemo2 is newer than 0.4.6-7fremantle7).

To quickly solve your problem now I would either install manually zip and p7zip, or simply run "apt-get -f install" to fix the dependencies (i.e. install zip and p7zip).

Hopefully once you do that xarchiver will be configured (i.e. postinstall will be executed) and (again, hopefully) you won't get any error message.

Once everything is OK you can (1) continue to live as until now, or (2) remove my-maemo from your repositories. Honestly, I had never heard of that catalog (thought it was just a web site). In general extras and extras-testing and extras-devel are more "reliable" than "third party" catalogs.

If you keep my-maemo catalog apt-get may complain from time to time that your version of xarchiver needs to be updated. If this bothers you you can "pin" xarchiver to that the version is fixed.