There are some packages missing but nothing too serious. This problem usually occurs when there is a bad cached copy or the repository is being updated. Not much you can do. It should go away on its own. If you still want to try something try: rm -R /var/lib/apt/lists/repository.maemo.org_extras* apt-get autoclean Then go to: (geneven's link) http://nokiadistrict.com/repositorie...or-nokia-n900/ and readd the repositories. Edit: It is more sensible to try with a differenet Wi-Fi connection. Preferibly from a different ISP.