A couple of attempts of Append/resume upload of part 27 of the split file using FZ 3-beta11 THESE timed out and iterated never appending data
followed by successful activation of resume operation using FZ 2.2.32

Response:	421 No-transfer-time exceeded. Closing control connection.
Error:	Disconnected from server
Status:	Resolving IP-Address for milton.dtdns.net
Status:	Connecting to 81.155.102.165:6921...
Status:	Connection established, waiting for welcome message...
Response:	220-FileZilla Server version 0.9.23 beta
Response:	220-written by Tim Kosse (Tim.Kosse@gmx.de)
Response:	220 Milton Avenue
Command:	USER addmine
Response:	331 Password required for addmine
Command:	PASS ***********
Response:	230 Logged on
Status:	Connected
Status:	Retrieving directory listing...
Command:	PWD
Response:	257 "/" is current directory.
Status:	Directory listing successful
Status:	Resolving IP-Address for milton.dtdns.net
Trace:	ControlSocket.cpp(948): CRealControlSocket::ContinueConnect(01333CF8) m_pEngine=012EF960   caller=013457B8
Status:	Connecting to 81.155.102.165:6921...
Status:	Connection established, waiting for welcome message...
Trace:	CFtpControlSocket::OnReceive()
Response:	220-FileZilla Server version 0.9.23 beta
Response:	220-written by Tim Kosse (Tim.Kosse@gmx.de)
Response:	220 Milton Avenue
Command:	USER addmine
Trace:	CFtpControlSocket::OnReceive()
Response:	331 Password required for addmine
Command:	PASS ***********
Trace:	CFtpControlSocket::OnReceive()
Response:	230 Logged on
Status:	Connected
Trace:	CFtpControlSocket::ResetOperation(0)
Trace:	CControlSocket::ResetOperation(0)
Trace:	CFtpControlSocket::FileTransfer()
Status:	Starting download of /HumaxMediaControllerV1.04/parts/20070722 1344 i7T4_ T4 on the Bea.ts.[76].27
Trace:	CFtpControlSocket::SendNextCommand(0)
Command:	CWD /HumaxMediaControllerV1.04/parts/
Trace:	CFtpControlSocket::OnReceive()
Response:	250 CWD successful. "/HumaxMediaControllerV1.04/parts" is current directory.
Command:	PWD
Trace:	CFtpControlSocket::OnReceive()
Response:	257 "/HumaxMediaControllerV1.04/parts" is current directory.
Trace:	CFtpControlSocket::ResetOperation(0)
Trace:	CControlSocket::ResetOperation(0)
Trace:	CFtpControlSocket::SendNextCommand(0)
Trace:	FileTransferSend()
Trace:	CFtpControlSocket::SendNextCommand(0)
Trace:	FileTransferSend()
Trace:	FileTransferTestResumeCapability()
Trace:	CFtpControlSocket::SendNextCommand(0)
Trace:	CFtpControlSocket::TransferSend(0)
Trace:	  state = 1
Command:	TYPE I
Trace:	CFtpControlSocket::OnReceive()
Response:	200 Type set to I
Trace:	CFtpControlSocket::TransferParseResponse()
Trace:	  code = 2
Trace:	  state = 1
Trace:	CFtpControlSocket::TransferSend(0)
Trace:	  state = 2
Command:	PASV
Trace:	CFtpControlSocket::OnReceive()
Response:	227 Entering Passive Mode (81,155,102,165,148,201)
Trace:	CFtpControlSocket::TransferParseResponse()
Trace:	  code = 2
Trace:	  state = 2
Trace:	CFtpControlSocket::TransferSend(0)
Trace:	  state = 3
Command:	REST 84930888
Trace:	CFtpControlSocket::OnReceive()
Response:	350 Rest supported. Restarting at 84930888
Trace:	CFtpControlSocket::TransferParseResponse()
Trace:	  code = 3
Trace:	  state = 3
Trace:	CFtpControlSocket::TransferSend(0)
Trace:	  state = 4
Command:	RETR 20070722 1344 i7T4_ T4 on the Bea.ts.[76].27
Trace:	CTransferSocket::OnConnect
Trace:	CFtpControlSocket::OnReceive()
Response:	150 Connection accepted, restarting at offset 84930888
Trace:	CFtpControlSocket::TransferParseResponse()
Trace:	  code = 1
Trace:	  state = 4
Trace:	CFtpControlSocket::TransferSend(0)
Trace:	  state = 5
Trace:	CTransferSocket::OnClose
Trace:	CTransferSocket::TransferEnd(1)
Trace:	CFtpControlSocket::TransferEnd()
Error:	Connection timed out
Trace:	CFtpControlSocket::ResetOperation(2114)
Trace:	CTransferSocket::TransferEnd(1)
Trace:	CControlSocket::ResetOperation(2114)
Trace:	CFtpControlSocket::ResetOperation(2114)
Trace:	CControlSocket::ResetOperation(2114)
Status:	Resolving IP-Address for milton.dtdns.net
Trace:	ControlSocket.cpp(948): CRealControlSocket::ContinueConnect(0133E168) m_pEngine=012EF960   caller=013457B8
Status:	Connecting to 81.155.102.165:6921...
Status:	Connection established, waiting for welcome message...
Trace:	CFtpControlSocket::OnReceive()
Response:	220-FileZilla Server version 0.9.23 beta
Response:	220-written by Tim Kosse (Tim.Kosse@gmx.de)
Response:	220 Milton Avenue
Command:	USER addmine
Trace:	CFtpControlSocket::OnReceive()
Response:	331 Password required for addmine
Command:	PASS ***********
Trace:	CFtpControlSocket::OnReceive()
Response:	230 Logged on
Status:	Connected
Trace:	CFtpControlSocket::ResetOperation(0)
Trace:	CControlSocket::ResetOperation(0)
Trace:	CFtpControlSocket::FileTransfer()
Status:	Starting download of /HumaxMediaControllerV1.04/parts/20070722 1344 i7T4_ T4 on the Bea.ts.[76].27
Trace:	CFtpControlSocket::SendNextCommand(0)
Command:	CWD /HumaxMediaControllerV1.04/parts/
Trace:	CFtpControlSocket::OnReceive()
Response:	250 CWD successful. "/HumaxMediaControllerV1.04/parts" is current directory.
Command:	PWD
Trace:	CFtpControlSocket::OnReceive()
Response:	257 "/HumaxMediaControllerV1.04/parts" is current directory.
Trace:	CFtpControlSocket::ResetOperation(0)
Trace:	CControlSocket::ResetOperation(0)
Trace:	CFtpControlSocket::SendNextCommand(0)
Trace:	FileTransferSend()
Status:	Skipping download of /HumaxMediaControllerV1.04/parts/20070722 1344 i7T4_ T4 on the Bea.ts.[76].27

*** I skipped here and tried again  to sho it was not just a glitch... 

Trace:	CFtpControlSocket::ResetOperation(0)
Trace:	CControlSocket::ResetOperation(0)
Status:	File transfer successful
Trace:	CFtpControlSocket::FileTransfer()
Status:	Starting download of /HumaxMediaControllerV1.04/parts/20070722 1344 i7T4_ T4 on the Bea.ts.[76].27
Trace:	CFtpControlSocket::OnReceive()
Error:	Disconnected from server
Trace:	CFtpControlSocket::ResetOperation(66)
Trace:	CControlSocket::ResetOperation(66)
Trace:	CFtpControlSocket::SendNextCommand(0)
Trace:	FileTransferSend()
Trace:	FileTransferTestResumeCapability()
Trace:	CFtpControlSocket::SendNextCommand(0)
Trace:	CFtpControlSocket::TransferSend(0)
Trace:	  state = 1
Command:	TYPE I
Trace:	CFtpControlSocket::OnReceive()
Response:	200 Type set to I
Trace:	CFtpControlSocket::TransferParseResponse()
Trace:	  code = 2
Trace:	  state = 1
Trace:	CFtpControlSocket::TransferSend(0)
Trace:	  state = 2
Command:	PASV
Trace:	CFtpControlSocket::OnReceive()
Response:	227 Entering Passive Mode (81,155,102,165,148,202)
Trace:	CFtpControlSocket::TransferParseResponse()
Trace:	  code = 2
Trace:	  state = 2
Trace:	CFtpControlSocket::TransferSend(0)
Trace:	  state = 3
Command:	REST 84930888
Trace:	CFtpControlSocket::OnReceive()
Response:	350 Rest supported. Restarting at 84930888
Trace:	CFtpControlSocket::TransferParseResponse()
Trace:	  code = 3
Trace:	  state = 3
Trace:	CFtpControlSocket::TransferSend(0)
Trace:	  state = 4
Command:	RETR 20070722 1344 i7T4_ T4 on the Bea.ts.[76].27
Trace:	CTransferSocket::OnConnect
Trace:	CFtpControlSocket::OnReceive()
Response:	150 Connection accepted, restarting at offset 84930888
Trace:	CFtpControlSocket::TransferParseResponse()
Trace:	  code = 1
Trace:	  state = 4
Trace:	CFtpControlSocket::TransferSend(0)
Trace:	  state = 5
Trace:	CTransferSocket::OnClose
Trace:	CTransferSocket::TransferEnd(1)
Trace:	CFtpControlSocket::TransferEnd()
Error:	Connection timed out
Trace:	CFtpControlSocket::ResetOperation(2114)
Trace:	CTransferSocket::TransferEnd(1)
Trace:	CControlSocket::ResetOperation(2114)
Trace:	CFtpControlSocket::ResetOperation(2114)
Trace:	CControlSocket::ResetOperation(2114)
Status:	Resolving IP-Address for milton.dtdns.net
Trace:	ControlSocket.cpp(948): CRealControlSocket::ContinueConnect(013405E0) m_pEngine=012EF960   caller=013457B8
Status:	Connecting to 81.155.102.165:6921...
Status:	Connection established, waiting for welcome message...
Trace:	CFtpControlSocket::OnReceive()
Response:	220-FileZilla Server version 0.9.23 beta
Response:	220-written by Tim Kosse (Tim.Kosse@gmx.de)
Response:	220 Milton Avenue
Command:	USER addmine
Trace:	CFtpControlSocket::OnReceive()
Response:	331 Password required for addmine
Command:	PASS ***********
Trace:	CFtpControlSocket::OnReceive()
Response:	230 Logged on
Status:	Connected
Trace:	CFtpControlSocket::ResetOperation(0)
Trace:	CControlSocket::ResetOperation(0)
Trace:	CFtpControlSocket::FileTransfer()
Status:	Starting download of /HumaxMediaControllerV1.04/parts/20070722 1344 i7T4_ T4 on the Bea.ts.[76].27
Trace:	CFtpControlSocket::SendNextCommand(0)
Command:	CWD /HumaxMediaControllerV1.04/parts/
Trace:	CFtpControlSocket::OnReceive()
Response:	250 CWD successful. "/HumaxMediaControllerV1.04/parts" is current directory.
Command:	PWD
Trace:	CFtpControlSocket::OnReceive()
Response:	257 "/HumaxMediaControllerV1.04/parts" is current directory.
Trace:	CFtpControlSocket::ResetOperation(0)
Trace:	CControlSocket::ResetOperation(0)
Trace:	CFtpControlSocket::SendNextCommand(0)
Trace:	FileTransferSend()
Trace:	CFtpControlSocket::SendNextCommand(0)
Trace:	FileTransferSend()
Trace:	FileTransferTestResumeCapability()
Trace:	CFtpControlSocket::SendNextCommand(0)
Trace:	CFtpControlSocket::TransferSend(0)
Trace:	  state = 1
Command:	TYPE I
Trace:	CFtpControlSocket::OnReceive()
Response:	200 Type set to I
Trace:	CFtpControlSocket::TransferParseResponse()
Trace:	  code = 2
Trace:	  state = 1
Trace:	CFtpControlSocket::TransferSend(0)
Trace:	  state = 2
Command:	PASV
Trace:	CFtpControlSocket::OnReceive()
Response:	227 Entering Passive Mode (81,155,102,165,148,203)
Trace:	CFtpControlSocket::TransferParseResponse()
Trace:	  code = 2
Trace:	  state = 2
Trace:	CFtpControlSocket::TransferSend(0)
Trace:	  state = 3
Command:	REST 84930888
Trace:	CFtpControlSocket::OnReceive()
Response:	350 Rest supported. Restarting at 84930888
Trace:	CFtpControlSocket::TransferParseResponse()
Trace:	  code = 3
Trace:	  state = 3
Trace:	CFtpControlSocket::TransferSend(0)
Trace:	  state = 4
Command:	RETR 20070722 1344 i7T4_ T4 on the Bea.ts.[76].27
Trace:	CTransferSocket::OnConnect
Trace:	CFtpControlSocket::OnReceive()
Response:	150 Connection accepted, restarting at offset 84930888
Trace:	CFtpControlSocket::TransferParseResponse()
Trace:	  code = 1
Trace:	  state = 4
Trace:	CFtpControlSocket::TransferSend(0)
Trace:	  state = 5
Trace:	CTransferSocket::OnClose
Trace:	CTransferSocket::TransferEnd(1)
Trace:	CFtpControlSocket::TransferEnd()
Error:	Connection timed out
Trace:	CFtpControlSocket::ResetOperation(2114)
Trace:	CTransferSocket::TransferEnd(1)
Trace:	CControlSocket::ResetOperation(2114)
Trace:	CFtpControlSocket::ResetOperation(2114)
Trace:	CControlSocket::ResetOperation(2114)
Status:	Resolving IP-Address for milton.dtdns.net
Trace:	ControlSocket.cpp(948): CRealControlSocket::ContinueConnect(0133E168) m_pEngine=012EF960   caller=013457B8
Status:	Connecting to 81.155.102.165:6921...
Status:	Connection established, waiting for welcome message...
Trace:	CFtpControlSocket::OnReceive()
Response:	220-FileZilla Server version 0.9.23 beta
Response:	220-written by Tim Kosse (Tim.Kosse@gmx.de)
Response:	220 Milton Avenue
Command:	USER addmine
Trace:	CFtpControlSocket::OnReceive()
Response:	331 Password required for addmine
Command:	PASS ***********
Trace:	CFtpControlSocket::OnReceive()
Response:	230 Logged on
Status:	Connected
Trace:	CFtpControlSocket::ResetOperation(0)
Trace:	CControlSocket::ResetOperation(0)
Trace:	CFtpControlSocket::FileTransfer()
Status:	Starting download of /HumaxMediaControllerV1.04/parts/20070722 1344 i7T4_ T4 on the Bea.ts.[76].27
Trace:	CFtpControlSocket::SendNextCommand(0)
Command:	CWD /HumaxMediaControllerV1.04/parts/
Trace:	CFtpControlSocket::OnReceive()
Response:	250 CWD successful. "/HumaxMediaControllerV1.04/parts" is current directory.
Command:	PWD
Trace:	CFtpControlSocket::OnReceive()
Response:	257 "/HumaxMediaControllerV1.04/parts" is current directory.
Trace:	CFtpControlSocket::ResetOperation(0)
Trace:	CControlSocket::ResetOperation(0)
Trace:	CFtpControlSocket::SendNextCommand(0)
Trace:	FileTransferSend()
Status:	Skipping download of /HumaxMediaControllerV1.04/parts/20070722 1344 i7T4_ T4 on the Bea.ts.[76].27

**************   this time I hit CANCEL and that seems to equate to skip quite reasonably.

Trace:	CFtpControlSocket::ResetOperation(0)
Trace:	CControlSocket::ResetOperation(0)
Status:	File transfer successful
Status:	Disconnected from server
Trace:	CFtpControlSocket::ResetOperation(66)
Trace:	CControlSocket::ResetOperation(66)

#####################   Under FZ 2.2.32 client

Command:	CWD parts
Response:	250 CWD successful. "/HumaxMediaControllerV1.04/parts" is current directory.
Command:	PWD
Response:	257 "/HumaxMediaControllerV1.04/parts" is current directory.
Status:	Directory listing successful
Status:	Connecting to milton.dtdns.net:6921 ...
Status:	Connected with milton.dtdns.net:6921. Waiting for welcome message...
Response:	220-FileZilla Server version 0.9.23 beta
Response:	220-written by Tim Kosse (Tim.Kosse@gmx.de)
Response:	220 Milton Avenue
Command:	USER addmine
Response:	331 Password required for addmine
Command:	PASS ***********
Response:	230 Logged on
Command:	SYST
Response:	215 UNIX emulated by FileZilla
Command:	FEAT
Response:	211-Features:
Response:	 MDTM
Response:	 REST STREAM
Response:	 SIZE
Response:	 MODE Z
Response:	 MLST type*;size*;modify*;
Response:	 MLSD
Response:	 UTF8
Response:	 CLNT
Response:	 MFMT
Response:	211 End
Status:	Connected
Status:	Starting download of /HumaxMediaControllerV1.04/parts/20070722 1344 i7T4_ T4 on the Bea.ts.[76].27
Command:	PWD
Response:	257 "/" is current directory.
Command:	CWD /HumaxMediaControllerV1.04/parts/
Response:	250 CWD successful. "/HumaxMediaControllerV1.04/parts" is current directory.
Command:	PWD
Response:	257 "/HumaxMediaControllerV1.04/parts" is current directory.
Command:	TYPE I
Response:	200 Type set to I
Command:	MODE Z
Response:	200 MODE set to Z.
Command:	OPTS MODE Z LEVEL 8
Response:	200 MODE Z LEVEL set to 8
Command:	PASV
Response:	227 Entering Passive Mode (81,155,102,165,148,203)
Command:	REST 84930888
Response:	350 Rest supported. Restarting at 84930888
Command:	RETR 20070722 1344 i7T4_ T4 on the Bea.ts.[76].27
Response:	150 Connection accepted, restarting at offset 84930888

########## ...and it happens OK   ######
Error:	Disconnected from server