>> The server is "ProFTPD 1.3.0rc2 Server", and it appears not to send
>> a 150 response to ls/NLST requests in empty directories.
>
> Yes, it does (or you would not be getting the 226 reply). The console
> output simply does not show it. That is why you need to use a better
> viewer of the FTP commands/replies.
I just got an email and it seems the vendor found the missing 150 response
bug, and fixed it in a later version:
http://bugs.proftpd.org/show_bug.cgi?id=2843
They were not opening a data channel, so there was no 150 response before
the 226 arrived, which matches my command/response log output and the ls
output I posted yesterday (but not dir output I incorrectly quoted).
Erik
