Directory listing fails for specific user

[Marcus Hann]

Hello,

We have recently had a new problem with one of the users on one of our servers. 

Filezilla claims it connects and authenticates, but then fails to list the directory (although no error message is output, it just eventually times out. There is the full output of filezilla located here: http://pastebin.com/tAVcSP8Y. 

>From the server side, the most verbose output I can make it print can be found here: http://pastebin.com/iW4BqALf. I have set the debug level to DEBUG3 in the  /etc/ssh/sshd_config line which now looks like:

Subsystem   sftp    /usr/libexec/openssh/sftp-server -l DEBUG3

And that is what came out. SSH works as expected for the user and I cannot think of anything that has changed that would cause it to stop working.

I do not get the same issue for other users on the same server. For example, the output of a working user connecting to the same server is: http://pastebin.com/6VtcCPhg (filezilla) and http://pastebin.com/9ETc8JSS (openssh). I'm at a complete loss as to what may be causing this and cannot find anyone on t'internet with the same issue. 

Thanks in advance,
Marcus