Description of problem:
When a prosess runs under username with length > 8 characters, only UID is
displayed.

Version-Release number of selected component (if applicable):
procps-3.2.7-8

How reproducible:
Always

Steps to Reproduce:
1. useradd longusername
2. su -
3. ps -f
  
Actual results:
[longusername@mufinek ~]$ ps -f
UID        PID  PPID  C STIME TTY          TIME CMD
500       4070  4069  1 09:31 pts/1    00:00:00 -bash
500       4088  4070  0 09:31 pts/1    00:00:00 ps -f


Expected results:
[longusername@mufinek ~]$ ps -f
UID        PID  PPID  C STIME TTY          TIME CMD
longusername       4070  4069  1 09:31 pts/1    00:00:00 -bash
longusername       4088  4070  0 09:31 pts/1    00:00:00 ps -f

...or maybe the username cut after the eigth character?

Additional info:
Maybe it's just a flavor, but I haven't noticed this behaviour mentioned in
docs/man page/etc