System info:
=========================================
gtk version: 2.3.2
vte version: 0.11.10
gnome-termianl version: 2.5.4
FreeBSD 5.2-CURRENT

I have all lastest version of Gnome 2.5.x tarballs installed. Joe 
(marcus_at_FreeBSD.org) is going to check on his FreeBSD machine that has 
Gnome 2.4.x and it's possible has the same problem exist.
=========================================


I noticed that the gnome-terminal doesn't exit the shell in the correct 
way. It will leave a lot of 'zsh' and 'su' when you exit the X (logout 
Gnome). The aterm, xterm, eterm and kde's stuff exit the shell perfect. 
Here's example what after I use gnome-terminal and exit X following:

=========================================
  PID USERNAME PRI NICE   SIZE    RES STATE    TIME   WCPU    CPU COMMAND
  637 root      76    0  1256K    80K select   3:18  0.00%  0.00% moused
  454 root       8    0  1364K   256K nanslp   0:00  0.00%  0.00% cron
  262 root      76    0  1336K   260K select   0:00  0.00%  0.00% syslogd
  279 root      76    0  1488K   436K select   0:00  0.00%  0.00% rpcbind
  433 root     131    0  3572K    32K select   0:00  0.00%  0.00% sshd
58315 mezz      76    0  5648K  3580K select   0:00  0.00%  0.00% 
bonobo-activa <-- here
58381 mezz       5    0  2904K  2376K ttyin    0:00  0.00%  0.00% zsh <-- 
here
49987 mezz      20    0  2780K  1244K pause    0:00  0.00%  0.00% zsh <-- 
here
58452 mezz      20    0  2784K  2248K pause    0:00  0.00%  0.00% zsh <-- 
here
58447 mezz       5    0  2784K  2244K ttyin    0:00  0.00%  0.00% zsh <-- 
here
58442 mezz       5    0  2784K  2244K ttyin    0:00  0.00%  0.00% zsh <-- 
here
58407 mezz       5    0  2784K  2012K ttyin    0:00  0.00%  0.00% zsh <-- 
here
58458 root       5    0  2340K  1668K ttyin    0:00  0.00%  0.00% csh <-- 
here
49986 root       8    0  1680K    64K wait     0:00  0.00%  0.00% login
58457 mezz       8    0  1672K  1204K wait     0:00  0.00%  0.00% su <-- 
here
58466 mezz      76    0  2244K  1220K RUN      0:00  0.00%  0.00% top
=========================================

Only one login when logout X:
=========================================
% who
mezz             ttyv0    Feb  6 00:47
=========================================