How many users do I REALLY have?
 

Look carefully at the output of the "w" command:
[ray@raymondjones ~]$ w
07:26:20 up 22 days, 22:49, 5 users, load average: 0.11, 0.13, 0.09
USER TTY FROM LOGIN@ IDLE JCPU PCPU WHAT
ray tty2 - 24Oct05 12days 32.59s 0.01s -bash
ray pts/1 :0.0 03Nov05 1:34m 1.74s 4:08 gnome-terminal
ray pts/2 :0.0 03Nov05 3:52 8.19s 8.16s ssh -X gordito
ray pts/3 :0.0 03Nov05 0.00s 3:22 0.00s w


Also, gkrellm shows 5 users. Somebody is clearly missing, here.
FC4 with no selinux running.

Try typing "who". It will give you a different, but complete list of "who" is running stuff (other than normal daemon processes).

Yup, and it shows 4 users, which is correct, though "who" doen't provide a user total. The ? remains, why would both w and gkrellm show 5?

[ray@raymondjones ~]$ who
ray tty2 Oct 24 09:37
ray pts/1 Nov 3 09:24 (:0.0)
ray pts/2 Nov 3 09:24 (:0.0)
ray pts/3 Nov 3 09:24 (:0.0)