problem with tabs exist .. If you change the nick of a contact in your hotmail address book or put a mobile number, something weird happens with Msg Plus! .. tabs are enabled for different nicks than wanted. You bring a contact on desktop and if that user has another email saved as work email in your hotmail address book these nicks will overlap on desktop.... I mean u want A to be on desktop but B will come.
check this thread for details.
http://shoutbox.menthix.net/showthread.php?tid=63525