Wanted to try kdirstat on ubuntu 10.04, but conflicted with pidgin, and didn't want to resolve that in order to install it:
sdoskurd@sdoux0072 (review_9849) Contacts $ sudo apt-get install kdirstat
The following packages have unmet dependencies:
kdirstat: Depends: kdelibs4c2a (>= 4:3.5.8-1) but it is not going to be installed
pidgin: Depends: pidgin-data (>= 1:2.7.9) but 1:2.7.7-1ubuntu0+pidgin1.10.04 is to be installed
E: Unmet dependencies. Try 'apt-get -f install' with no packages (or specify a solution).