This, for example, from MSN/CareerBuilder's recent 10 Worst Work Habits:
Using your supervisor's first name […is] common in many industries.Merely "common"?
The only time I've addressed a boss by anything other than a first name was as a teenage babysitter. (Now, bosses' bosses -- that's a different story and helps me to get into the mindset. Even when promoted to report to a former boss's boss, changing the reference was like growing into adulthood and trying to call my parents' friends by their first names.)
So of course, now I'm interested in finding a workplace where first names aren't allowed, or creating a character in a normal workplace who doesn't allow it...