For the last two days every time I try to log out I get the pop-up: "Logout has timed out. Mirror Agent failed to quit and is not responding." My husband (the other user on this mac) does not have the same problem with his account. I've tried to read other forums (about the Activity Monitor and iDisc and all) but I'm not real hip with this, and nothing seems to have worked so far. (I end up having to shut down.) I have an iMac, OX 10.4.11 --- any help is appreciated.