I think I messed up ... "Strange_group_or_user_id" problem

My smartlist was running until ... some while ago -- I think it was that I 
relaxed some folder/file permissions to their "group" for my convenience 
to look at or modofy files (access to list rc.local.xx etc).  Now the list 
quit working while error shows up in the system maillog:

------
Sep 28 22:40:57 nagrp4 procmail[2762]: Error while writing to "log"
Sep 28 22:40:57 nagrp4 qmail: 1254195657.852305 delivery 52: success: 
flist:_Strange_group_or_user_id/did_0+0+1/
------

As I do not remember exactly what I changed, suggestions for default 
file permissions are appreciated!

ps: this rpm install made 'ntp' as the owner/groups; never seen before
drwx--s--x 10 ntp  ntp   4.0K Aug 30 20:40 list
->
  drwxr-sr-x  2 root list 4096 Sep  4 14:21 .bin
  ->
   -rwxr-xr-x  1 ntp  ntp   9659 Aug 30 21:16 arch_retrieve
   -rwxr-xr-x  1 ntp  ntp    456 Jan 18  2007 arch_trunc
   -rwxr-xr-x  5 root ntp  25432 Jan 18  2007 choplist
   -rwxr-xr-x  1 ntp  ntp   6151 Jan 18  2007 confirm
   -rwxr-xr-x  1 ntp  ntp   3815 Jan 18  2007 confirm_add
   -rwxr-xr-x  1 ntp  ntp   6354 Jan 18  2007 confirm_del
   -rwxr-xr-x  1 ntp  ntp   2491 Jan 18  2007 confirm_sub
   -rwxr-xr-x  1 ntp  ntp   6103 Jan 18  2007 createlist
   -rwxr-xr-x  1 ntp  ntp   1192 Jan 18  2007 cronlist
   -rwxr-xr-x  1 ntp  ntp    818 Jan 18  2007 delink
   -rwxr-xr-x  1 ntp  ntp   3877 Jan 18  2007 digest
   -rwxr-xr-x  1 ntp  ntp   2142 Jan 18  2007 donatelist
   -rwxr-xr-x  1 ntp  ntp   3123 Jan 18  2007 extraddr
   -rwxr-xr-x  5 root ntp  25432 Jan 18  2007 flist
   -rwxr-xr-x  1 ntp  ntp   3506 Jan 18  2007 flush_digests
   -rwxr-xr-x  5 root ntp  25432 Jan 18  2007 idhash
   -rwxr-xr-x  1 ntp  ntp   3598 Jan 18  2007 led
   -rw-r--r--  1 ntp  ntp   1566 Jan 18  2007 mimencap
   -rw-r--r--  1 ntp  ntp   4363 Jan 18  2007 mimencap.local
   -rwxr-xr-x  1 ntp  ntp   2524 Jan 18  2007 mimesend
   -rwxr-xr-x  1 ntp  ntp   9283 Jan 18  2007 mindlist
   -rwxr-xr-x  5 root ntp  25432 Jan 18  2007 multigram
   -rwxr-xr-x  1 ntp  ntp   4291 Jan 18  2007 procbounce
   lrwxrwxrwx  1 root list    17 Aug 30 15:54 procmail -> /usr/bin/procmail
   -rwxr-xr-x  1 ntp  ntp   1944 Jan 18  2007 removelist
   -rwxr-xr-x  5 root ntp  25432 Jan 18  2007 senddigest
   -rwxr-xr-x  1 ntp  ntp   1223 Jan 18  2007 sendmails
   -rwxr-xr-x  1 ntp  ntp   2112 Jan 18  2007 showlink
   -rwxr-xr-x  1 ntp  ntp   4018 Jan 18  2007 showlist
   -rwxr-xr-x  1 ntp  ntp   3776 Sep  4 14:21 subscribe
   -rwxr-xr-x  1 ntp  ntp   2487 Sep  4 14:21 unsubscribe
   -rwxr-xr-x  1 ntp  ntp   3309 Jan 18  2007 x_command

  drwxr-sr-x  2 root list 4096 Aug 30 17:03 .etc
  drwxr-sr-x  8 root ntp  4096 Sep 28 20:54 mylist
  ->
   drwxr-s--- 5 root list 4.0K Sep 22  2008 archive
   drwxr-s--- 2 root list 4.0K Sep 24 13:36 bounces
   -rw-rw-r-- 1 root list   99 Sep 24 20:54 dist
   -rw-rw-rw- 1 root list 321K Sep 24 21:23 log
   -rw-rw---- 1 root list 4.7K Aug 24 13:50 rc.custom
   -rw-rw---- 1 root list  11K Sep  2 13:48 rc.init
   -rw-rw---- 1 root list  960 Aug 24 13:50 rc.local.r00
   -rw-rw---- 1 root list 1010 Aug 24 13:50 rc.local.r20
   -rw-rw---- 1 root list 5.8K Aug 24 13:50 rc.local.s00
   -rw-rw---- 1 root list 5.6K Sep  8 08:59 rc.local.s20
   -rw-rw---- 1 root list 9.6K Aug 24 13:50 rc.request
   -rw-rw---- 1 root list 9.0K Aug 24 13:50 rc.submit
   -rw-r----- 1 root list  663 Jul 31 13:28 reject
   -rw-r----- 1 root list  503 Sep 24 13:36 tmp.from
   -rw-r----- 1 root list 9.3K Sep 24 20:26 tmp.mail
   -rw-r----- 1 root list  11K Sep 24 13:36 tmp.request