When opening Chatlog ("L") its overflooded by old chat lines (lets call that: Chat History), thus rendering the real Chatlog unreadable. The Chat History does not reset when switching server. Thus its always there,
PS: sorry if the category name is chosen bad, couldnt come up with a better name
Idea: If "L" would only display the "Chat History" ( not the opaque Chatlog Window ) it might even be a good replacement =D