If lower case of a character is longer than upper case of that,
then
-----
DIR <i>.*
-----
does not match even if <i>.TXT exists ( '<i>' is ONE character whose
lower case is longer than whose upper case of that).

Because in strlower_m at util_str.c:1138

        /* I assume that lowercased string takes the same number of bytes
         * as source string even in UTF-8 encoding. (VIV) */
        unix_strlower(s,strlen(s)+1,s,strlen(s)+1);

Please do not assume.

Now there are lots of messages like:

[2003/07/05 21:34:02, 0] lib/charcnv.c:convert_string(194)
  convert_string: Required 8, available 5

When I insert smb_panic() after that message and type:
-----
DIR <i>.*
-----
then the stack trace is:

[2003/07/05 21:34:02, 0] lib/util.c:smb_panic(1469)
  BACKTRACE: 15 stack frames:
   #0 bin/smbd(smb_panic+0x16b) [0x816d4e3]
   #1 bin/smbd(convert_string+0xf2) [0x815cb36]
   #2 bin/smbd(unix_strlower+0x78) [0x815cf0c]
   #3 bin/smbd(strlower_m+0x53) [0x81677f3]
   #4 bin/smbd(mask_match+0x95) [0x816eadd]
   #5 bin/smbd [0x80998e3]
   #6 bin/smbd [0x809ac4b]
   #7 bin/smbd(reply_trans2+0x6bc) [0x80a077c]
   #8 bin/smbd [0x80b09ee]
   #9 bin/smbd [0x80b0a8e]
   #10 bin/smbd(process_smb+0x187) [0x80b0d33]
   #11 bin/smbd(smbd_process+0x1b2) [0x80b16a2]
   #12 bin/smbd(main+0x6cb) [0x81b53af]
   #13 /lib/libc.so.6(__libc_start_main+0xbb) [0x4016114f]
   #14 bin/smbd(yp_get_default_domain+0x69) [0x8070de1]