rooster = And (ClassName "Skype") (Not (Role "ConversationsWindow"))
*amused* You are familiar with the term "roster"?
The problem is that opening a conversation window still gets opened in
the sidebar and removes the rooster which goes to the main area? What I
am doing wrong? I have seen a number of config files with the above line
Recent Skype is doing something rather evil --- the EWMH versions of those entries don't agree with the ICCCM versions, and this confuses xmonad (not to mention people trying to configure xmonad...). Can you provide a full xprop output for the roster window so we can see exactly how this one is messing things up (the last one I looked at had the class okay but name and title were confused and inconsistent; I think there's been another update since then).