Bug#1869: wu-ftpd has the old ftp.debian.org bug :-/
As you can see, wu-ftpd on chiark violates the FTP protocol pretty
badly when the pwd fails. This makes ncftp fall over.
-chiark:~> telnet localhost ftp
Connected to localhost.
Escape character is '^]'.
220 chiark FTP server (Version wu-2.4(4) Wed Sep 13 09:31:11 MET DST 1995) ready.
331 Guest login ok, send your complete e-mail address as password.
230 Guest login ok, access restrictions apply.
250-To get files uploaded to ftp.debian.org via chiark:
250-1. Upload it to chiark:/pub/debian/private/project/Incoming.
250-2. Move the files using RENAME to chiark:.../project/queue.
250-If you want to abort an upload you may delete files from Incoming or
250-queue. Do not simply upload to queue, as chiark may start to transfer
250-the file to ftp.debian.org before you're finished uploading it.
250 CWD command successful.
550 firstname.lastname@example.org: pwd
Connection closed by foreign host.