I can't reproduce this error (update-alternatives: warning: forcing reinstallation of alternative /usr/bin/unrar-nonfree because link group unrar is broken) on Ubuntu 12.04:
baltix@ubuntu:~/Atsiuntimai$ sudo dpkg -i unrar_5.0.10-1_i386.deb (Reading database ... 160786 files and directories currently installed.) Preparing to replace unrar 1:4.0.3-1 (using unrar_5.0.10-1_i386.deb) ... Unpacking replacement unrar ... Setting up unrar (1:5.0.10-1) ... Processing triggers for man-db ... baltix@ubuntu:~/Atsiuntimai$ -- Labanaktis/Good luck, Mantas Kriaučiūnas Jabber ID: man...@akl.lt GPG ID: 43535BD5 Public organization "Open Source for Lithuania" - www.akl.lt Geriausios biuro programos verslui ir namams - http://openoffice.lt Prekyba naujais ir atnaujintais kompiuteriais su Linux OS - http://tinklas.eu Naudok Baltix GNU/Linux sistemą savo kompiuteryje - http://baltix.lt -- To UNSUBSCRIBE, email to debian-bugs-dist-requ...@lists.debian.org with a subject of "unsubscribe". Trouble? Contact listmas...@lists.debian.org