SFTP disconnects partway through file transfer

Hi guys, just started having this problem with FlashFXP and one of the servers I connect to via SCP. When I try to upload a file, it gets partway through the file upload, then disconnects with an error message, posted below:
[R] Uploading: /usr/home/DxC/d2ecc86e7eb3e64a082082830b0c056c.png
[R] SFTP Connection closed (No such file)
Transferred: d2ecc86e7eb3e64a082082830b0c056c.png 336 KB in 2 seconds (169.5 KB/s)
[R] Retrieving file list...
[R] List error [SFTP component not connected]
[R] List Complete: 0 bytes in 0.00 second (0.0 KB/s)
Transfer queue completed
Transferred 1 File (336 KB) in 2 seconds (162.0 KB/s)
[R] SSH Connection closed
[R] Connection lost: Avalon (Duration: 3 minutes 29 seconds)
And this is in my server's auth.log:
May 31 15:05:19 avalon sshd[84188]: Accepted publickey for DxC from IP redacted port 1282 ssh2
May 31 15:05:20 avalon sshd[84190]: subsystem request for sftp by user DxC
May 31 15:05:25 avalon sshd[84190]: channel 0: rcvd too much data 32768, win 7641
May 31 15:05:26 avalon last message repeated 3 times
May 31 15:05:26 avalon sftp-server[84191]: error: bad message from IP redacted local user DxC
May 31 15:06:55 avalon sshd[84284]: Accepted publickey for DxC from IP redacted port 1295 ssh2
May 31 15:06:55 avalon sshd[84286]: subsystem request for sftp by user DxC
May 31 15:10:21 avalon sshd[84286]: channel 0: rcvd too much data 32768, win 5987
May 31 15:10:22 avalon last message repeated 3 times
May 31 15:10:22 avalon sftp-server[84287]: error: bad message from IP redacted local user DxC
May 31 15:12:11 avalon sshd[84488]: Accepted publickey for DxC from IP redacted port 1298 ssh2
May 31 15:12:14 avalon su: DxC to root on /dev/pts/0
Server OS is FreeBSD 9.0 Release x32, flashfxp is version 4.2.3 build 1771. Any ideas? If I'm missing anything, let me know.

Can you please post the first few lines after connecting to the server that reveal the server name and version, along with cipher, mac, compression, so we can see exactly what configuration is being used.

If at all possible could you send me a private message with a test account to the server, I will personally investigate the issue and try and determine exactly why its failing.

Sure.
[R] Host key algorithm ssh-RSA, size 2048 bits.
[R] Key exchange: diffie-hellman-group14-sha1. Session encryption: aes256-ctr, MAC: hmac-sha1, compression: zlib@openssh.com.
[R] Auth Type: Public Key
[R] Connection established with OpenSSH_5.8p2_hpn13v11 FreeBSD-20110503 (SFTP v3)
This it?

Did this issue start after upgrading FlashFXP? If so what version did you upgrade from?

I'm not entirely sure why the transfer is failing in your situation, I tested a similar OpenSSH server but was unable to reproduce the problem.

Would it be possible for you to setup a test account for me on the server?

Originally Posted by bigstar

Did this issue start after upgrading FlashFXP? If so what version did you upgrade from?

I'm not entirely sure why the transfer is failing in your situation, I tested a similar OpenSSH server but was unable to reproduce the problem.

Would it be possible for you to setup a test account for me on the server?

That's doable, sure...Got a lot of stuff to do today, but I'll get around to it eventually and PM you the info, in the meantime, can you PM me a SSH key you wish to use?
Also, I don't think the issue coordinates with upgrading flashfxp, I'll see about checking, though...I think I have an older version on my laptop.

Okay, I just checked, it does not work on my laptop, which has 4.2.2 b1764, also tried with multiple servers using SCP, fails for all of them, so I'm not sure whats going on now, whether its client-side or server-side.

Fixed (seemingly) with latest version.