Sun Java Directory Server icon

This probably is immensely trivial, but as the bank robber in the movie Dirty Harry says, "I gots to know."

In Sun Java Directory Server's (v 5.2) list of users and groups, there are several scores of usernames that have an icon that looks like a blue circle. Below that are scores of usernames with icons that look like human torsos. The torso icon is the one you see in documentation. The blue circle ones do not show up when you search for that username. What's the difference between the two?

---------- Post updated 02-12-13 at 02:41 PM ---------- Previous update was 02-11-13 at 03:32 PM ----------

For anyone interested, Sun Java Directory Server apparently gives a different icon to accounts that were created outside of JDS. Accounts created in JDS have two more entries than in the ones either imported into LDAP or created with other LDAP tools or migrated from NIS+. JDS won't search those accounts either.