After a recent patch upgrade of smartermail (I'm not sure which one) a couple of our Outlook users reported their contact list got shifted over by one. In other words, an email to email@example.com actually went to firstname.lastname@example.org (the next person in their contact list). The "file as" and display name says email@example.com but the email address says firstname.lastname@example.org.
As you can imagine, this has potentially disastrous implications. We have notified all our users to watch out for it, but has anybody experienced this? What would be the cause of it?