Here is new feature, now you can upload files from other sites/servers and you can do that from http or ftp server and also you can upload from password protected pages (http authentication), you can use this format:
http://username:pass@domain.com/somefile.zip
also standard:
http://www.domain.com/somefile.zip
and ftp:
ftp://someftpserver.com/somefile.zip
please report any problem...