As mentionned by Justin, this is not a bug. I don't really find any documentation about this but the source code of recent version of procps seems to be quite sufficient (unless i'm wrong).
In minimal.c:
[...]
static void print_proc(void){
[...]
case 'f':
printf(
"%8s %5d %5d %s %s %s %s",
do_user(), P_pid, P_ppid, do_cpu(0), do_stime(), P_tty_text,
do_time(P_utime+P_stime) );
[...]
--
Guillaume Delacour
signature.asc
Description: PGP signature
