Unable to see currently logged in users if they are on a Xwin terminal. Console, telnet, and rsh'ed users are displayed. I have found this problem on konsole, rxvt, Eterm, and gnome-terminal. Xterm is the only one that logs users. Gnome-terminal allows the parameters --utmp and --wtmp to allow the proper logging, the other terminals do not.
Forgot to mention that I'm using last, w, and who.
the question of whether utmp/wtmp should be updated for a terminal window is a long held and historic argument. This behaviour is considered by some a bug, by others not.
*** Bug 7543 has been marked as a duplicate of this bug. ***
But should there not be at least a single entry for the X session ? There is obviously someone logged in, but w/last/who suggests that there isn't anyone.