Recently, my messenger just started acting really weird. I logged in, and everyone i had on my contact list were asking me to add them again, even though i had everyone on the list, and everyone was blocked. all my contacts were blocked. there was no way to unblock them.
just in case you guys are suffering from the same thing, here is the solution.
Go to User/(your username)/Library/Preferences/Microsoft
and delete a file called Microsoft Messenger User Cache.plist
it's safe to do so, don't worry :) what this will do is that msn won't remember your history.. so your emoticons, chat history.. poof. well thats what it did to mine anyway!
