I have encountered the same issue due to the following misconfiguration: In lftp the configuration variable ftp:ssl-protect-list defaults to yes. Most times if TLS is enabled on the server it will either be on both channels or only on the control channel. So, when you connect to a server that requires TLS only on the control channel then you should not use TLS for LISTs (which happen on the data channel). The ftp:ssl-protect-list variable controls exactly this, and since by default it is set to yes it creates problems with servers that don't user TLS on the data channel.
Could the bug reporter check the value of ftp:ssl-protect-list? If it has the default value of "yes" then perhaps he could try unsetting it to see if LISTs work that way. -- To UNSUBSCRIBE, email to [EMAIL PROTECTED] with a subject of "unsubscribe". Trouble? Contact [EMAIL PROTECTED]