It was sometime since I tried to install Skype in Ubuntu. At my workstation I had no problems at all, by following the instructions in the following page http://ubuntuguide.org/wiki/Ubuntu:Karmic#Skype
sudo apt-get install ia32-libs lib32asound2 libqt4-core libqt4-gui
* Then download and install the current Skype .deb package from the Skype website:
wget -O skype_ubuntu-current_amd64.deb http://www.skype.com/go/getskype-linux-beta-ubuntu-64
sudo dpkg -i skype-ubuntu-current_amd64.deb
I will have to try now in the laptop and the netbook to see if they give me any trouble...