4203:31337 (possible exploit?)

[Mike -freebsd]

Guys, is anyone else seeing this?

Check for files with an unknown user or group:
  /usr/ports
  /usr/ports/Mk
  /usr/ports/Mk/bsd.commands.mk
  /usr/ports/Mk/bsd.apache.mk
  [.....whole ports tree.....]

# ls -al /usr/
total 48
drwxr-xr-x  14 root  wheel   512 Jun 27 20:01 .
drwxr-xr-x  23 root  wheel   512 Nov  4 20:51 ..
lrwxr-xr-x   1 root  wheel    10 Oct 14 14:45 X11R6 -> /usr/local
drwxr-xr-x   2 root  wheel  7168 Nov  7 05:04 bin
drwxr-xr-x   2 root  wheel   512 Oct 20 06:38 games
drwxr-xr-x  47 root  wheel  4608 Oct 20 06:39 include
drwxr-xr-x   6 root  wheel  8192 Oct 20 06:39 lib
drwxr-xr-x   5 root  wheel   512 Jan 27  2007 libdata
drwxr-xr-x   5 root  wheel  1536 Oct 20 06:39 libexec
drwxr-xr-x  14 root  wheel   512 Oct 17 16:55 local
drwxr-xr-x   3 root  wheel   512 Oct 20 14:13 obj
drwxr-xr-x  69 4203  31337  1536 Nov  9 13:59 ports
drwxr-xr-x   2 root  wheel  4608 Oct 20 06:39 sbin
drwxr-xr-x  26 root  wheel   512 Jan 27  2007 share
drwxr-xr-x  23 root  wheel  1024 Oct 20 04:55 src

I see this on three of four FreeBSD 7 boxes and only on /usr/ports/
(why...?). Anyone else?