quote:
I downgraded to 2009 again only to find that it wouldn't let me sign in because "The Windows Live Messenger team has identified an important security issue in Messenger."
Are you sure you tried WLM 2009 QFE3? If there was really a "important security issue" in that one XP users are screwed because that's the newest version they can use, WLM 2011 doesn't support XP.