I'm not using the 1.2.0.18 version of Skype myself, as I prefer to have my contacts stored locally (and the old version will do that). But I installed 1.2.0.18 for a colleague, everything looked fine but suddenly (after a few days) half of her contacts just disappeared.
What's going on? It must be something about the centrally stored contacts I presume, because something like that has never happened with my older version.
-Tor