UTF8 失效？

最近 auto update 過後似乎碰到了和之前用 unstable 一樣的問題，FTPRush 連上 zFTP Server 不會送 OPTS UTF8 ON 這個指令，照成 utf8 似乎無效？

今天看到 FlashFXP 的 3.6RC 有 utf8 support 想說要試試看，才發現到這個問題，這邊有人碰到一樣的問題嗎？

zFTPServer Suite Version Information
------------------------------------
Administration Build: 2007-09-25 18:04
Server Build: 2007-09-25 18:03

附一段 FTPRush 連線的 log...

(19:31:56) [2] 220 zFTPServer v2.0, build 2007-09-25 18:03 ready.
(19:31:56) [2]     AUTH TLS
(19:31:56) [2] 234 AUTH Command OK. Initializing SSL
(19:31:57) [2] Encryption algorithm: TLSv1 DHE-RSA-AES256-SHA-256
(19:31:57) [2]     PBSZ 0
(19:31:58) [2] 200 PBSZ Command OK. Protection buffer size set to 0.
(19:31:58) [2]     USER Admin
(19:31:58) [2] 331 User name received, need password.
(19:31:58) [2]     PASS (hidden)
(19:31:58) [2] 230 User logged in, proceed.
(19:31:58) [2]     SYST
(19:31:58) [2] 215 UNIX Type: L8
(19:31:58) [2]     PROT C
(19:31:59) [2] 200 PROT Command OK. Using Clear data connection
(19:31:59) [2]     TYPE A
(19:31:59) [2] 200 Type set to A.
(19:31:59) [2]     REST 1
(19:31:59) [2] 350 Requested file action pending further information.
(19:31:59) [2]     REST 0
(19:31:59) [2] 350 Requested file action pending further information.
(19:31:59) [2]     FEAT
(19:31:59) [2] 211-Extensions supported:
(19:31:59) [2] 211-AUTH TLS;AUTH TLS-C;SSL;TLS-P;
(19:31:59) [2] 211-CCC
(19:31:59) [2] 211-CLNT
(19:31:59) [2] 211-UTF8
(19:31:59) [2] 211-CPSV
(19:31:59) [2] 211-EPRT
(19:31:59) [2] 211-EPSV
(19:31:59) [2] 211-LIST -laT
(19:31:59) [2] 211-MDTM
(19:31:59) [2] 211-MDTM YYYYMMDDHHMMSS filename
(19:31:59) [2] 211-MFF Modify;
(19:31:59) [2] 211-MFMT
(19:31:59) [2] 211-MLSD
(19:31:59) [2] 211-MLST size*;Type*;Modify*;
(19:31:59) [2] 211-PBSZ
(19:31:59) [2] 211-PROT
(19:31:59) [2] 211-REST STREAM
(19:31:59) [2] 211-SITE ZONE;UTIME
(19:31:59) [2] 211-SIZE
(19:31:59) [2] 211-SPSV
(19:31:59) [2] 211-SSCN
(19:31:59) [2] 211-STAT -laT
(19:31:59) [2] 211-TVFS
(19:31:59) [2] 211-XCRC "filename" start end
(19:31:59) [2] 211-XMD5 "filename" start end
(19:31:59) [2] 211-Compliance Level: 20020901 (IETF mlst-16)
(19:31:59) [2] 211 End of extensions.
(19:31:59) [2]     PWD
(19:32:00) [2] 257 "/" is working directory.

連 G6 的話像這樣...

(19:35:01) [2] 220 Gene6 FTP Server v3.9.0 (Build 2) ready...
(19:35:01) [2]     AUTH TLS
(19:35:01) [2] 234 AUTH command ok; starting SSL connection.
(19:35:01) [2] Encryption algorithm: TLSv1 AES256-SHA-256
(19:35:01) [2]     PBSZ 0
(19:35:01) [2] 200 PBSZ=0
(19:35:01) [2]     USER Maverick
(19:35:01) [2] 331 Password required for Maverick.
(19:35:01) [2]     PASS (hidden)
(19:35:01) [2] 230 User Maverick logged in.
(19:35:01) [2]     SYST
(19:35:01) [2] 215 UNIX Type: L8
(19:35:01) [2]     PROT P
(19:35:01) [2] 200 PROT command successful.
(19:35:01) [2]     TYPE A
(19:35:01) [2] 200 Type set to A.
(19:35:01) [2]     REST 1
(19:35:01) [2] 350 Restarting at 1. Send STORE or RETRIEVE.
(19:35:01) [2]     REST 0
(19:35:01) [2] 350 Restarting at 0. Send STORE or RETRIEVE.
(19:35:01) [2]     FEAT
(19:35:01) [2] 211-Extensions supported:
(19:35:01) [2]  AUTH TLS
(19:35:01) [2]  CCC
(19:35:01) [2]  CLNT
(19:35:01) [2]  CPSV
(19:35:01) [2]  EPRT
(19:35:01) [2]  EPSV
(19:35:01) [2]  MDTM
(19:35:01) [2]  MFCT
(19:35:01) [2]  MFMT
(19:35:01) [2]  MLST type*;size*;create;modify*;
(19:35:01) [2]  MODE Z
(19:35:01) [2]  PASV
(19:35:01) [2]  PBSZ
(19:35:01) [2]  PROT
(19:35:01) [2]  REST STREAM
(19:35:01) [2]  SIZE
(19:35:01) [2]  SSCN
(19:35:01) [2]  TVFS
(19:35:01) [2]  UTF8
(19:35:01) [2]  XCRC "filename" SP EP
(19:35:01) [2]  XMD5 "filename" SP EP
(19:35:01) [2]  XSHA1 "filename" SP EP
(19:35:01) [2] 211 End.
(19:35:01) [2]     CLNT FTPRush 1.0.0.623U
(19:35:01) [2] 200 Noted.
(19:35:01) [2]     OPTS UTF8 ON
(19:35:01) [2] 200 UTF8 OPTS ON
(19:35:01) [2]     MODE Z
(19:35:01) [2] 200 Mode Z ok.
(19:35:01) [2]     PWD
(19:35:01) [2] 257 "/" is current directory.

似乎要送 CLNT 過去才會接著開 OPTS UTF8 ON，我沒去查 RFC 的規範...