I did a search (apt-cache search) and I found the following package "unrar-free". I installed it (apt-get install unrar-free) and and now I can unrar files with Ark.
-- Ark do not open *.deb files when clicked from Konqueror https://launchpad.net/bugs/39534 -- kubuntu-bugs mailing list kubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/kubuntu-bugs
