strange log records with iconv

[mishell at trg.ru]

hi, ppl
i have samba 3.0-cvs compiled with icov sapport. in smb.conf:
[global]
        dos charset = 866
        unix charset = KOI8-R
        display charset = KOI8-R

in log.smbd i see strange records:
----------------------
[2001/12/21 17:59:13, 0] lib/charcnv.c:convert_string(141)
  Required 1, available 0
[2001/12/21 17:59:17, 0] lib/charcnv.c:convert_string(141)
  Required 14, available 13
----------------------

what\'s wrong?