I am running Mac OS 10.5.6 on a 2.16 Blackbook. There are two users registered to my system. My Login with a password and my housemate's user name (without a password). This was the massive bug I noticed. I was logged in when I opened the lid to receive the user and password prompt. At that point when I entered my housemate's user ID, Mac took my to MY desktop. I was able to replicate this occurrence several times. Any idea what's happening?