Pjwalsh created the issue

On both Mac and Windows, attempting to use login credentials that are username with no password does not work. The popup box showing the login apparently requires a password and won't allow that field to be left empty or blank.

Tested on Win v.4.0.2 and Mac v.4.0.2. Other webdav clients handle this fine, but I'd rather use cyberduck. For me this is a big deal since I don't have control over the account being used or its password.

Thanks for fixing this. Hopefully its a minor change for you.