I saw a nice program for managing pictures called gThumb. I decided to install it, but it uninstalled half of my programs and my theme altogether. I used Software Center to install it. Why would installing gThumb through Software Center mess up my PC? I'm using Debian 6.0.3 with Gnome.
Even Software Center disappeared from the System menu in gnome panel. I retrieved it by
apt-get install software-center, and I think it installed it completely, not by updating or installing missing packages.
Edit: I tried
apt-get -f install and it didn't work. I checked for programs in package manager but they are not there. They are UNINSTALLED for sure.
I reinstalled my system yesterday, so it's fresh now, but I would still like to know what happened.