Apparently switching user identities is a known problem in SquirrelMail 1.4.x.
This thread has the discussion. Apparently it’s caused by accessing multiple accounts from the same computer at the same time (presumably using the same browser). I don’t think our students are quite doing that, however, I would be willing to believe that they aren’t logging out (just closing the window) and quite likely not logging out of the workstation, either. Squirrel sees about 5000 logins per day and only about 2000 logouts, so this fits. I’ve added a cautionary note to the login messages on Squirrel.
Posted by Rowan Littell at February 16, 2004 04:53 PM