(To answer one of my own questions, RE alternative ways to obtain these packages: I just visited the Ubuntu Maverick package page for i386 kdirstat ( https://launchpad.net/ubuntu/maverick/i386/kdirstat ), clicked on the 'version' link, downloaded the .deb from there, and then opened that deb in Ubuntu Software Center. It installed just fine)
(To answer one of my own questions, RE alternative ways to obtain these packages: I just visited the Ubuntu Maverick package page for i386 kdirstat ( https:/ /launchpad. net/ubuntu/ maverick/ i386/kdirstat ), clicked on the 'version' link, downloaded the .deb from there, and then opened that deb in Ubuntu Software Center. It installed just fine)