I can finally say that there is no bug (or maybe yes :-S) at libfontconfig nor ia32-libs packages. Moving out $HOME/.fontconfig and running skype again got it working.
I could attach a tar.gz of my old $HOME/.fontconfig if you want to debug it. ** Changed in: fontconfig (Ubuntu) Status: New => Invalid -- buggy 32bit libfontconfig.so.1 in karmic amd64 https://bugs.launchpad.net/bugs/486035 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs