I accidentally removed i32-libs using the following command
sudo apt-get remove ia32-libs
Now the GUI is not working properly: when I login, it just shows me a small terminal on one side of the screen, and nothing on the rest of the desktop. I ran
sudo apt-get install ubuntu-desktop
and I tried choosing a different session type on the login screen; if I select “Ubuntu classic mode” the desktop is fine but some applications still fail; for example when I start Skype, I see the message
skype: error while loading shared libraries: libXss.so.1: wrong ELF class: ELFCLASS64
sudo apt-get install ia32-libs? – pbm Mar 17 '12 at 20:52