This has been reported by trini and some other people a few times. I am not sure why this occurs but I am 99% sure that disabling the roaming option of Messenger (Messenger Options>General>"Use same display picture and personal message everywhere I sign in" solves it (you do not need that option enabled if you do not use any other computer to sign-in Messenger)
quote:
Originally posted by snootchies
Usually P or ', but many others.
I found Trini's thread and surprisingly they are exactly same characters as you said: