I think that this is a bug with the 'Connect to Server' tool, rather than any inherent problem with Nautilus.
I found that I was able to access a WebDAV (HTTPS) server by opening Nautilus, then typing ctrl-L to open the location bar, then typing in davs://server.example.com/folder/name/ and pressing enter. A box then popped up asking for username and password.
There is still a bug however, because I cannot access the same location using the Places-->Connect to Server method.
I think that this is a bug with the 'Connect to Server' tool, rather than any inherent problem with Nautilus.
I found that I was able to access a WebDAV (HTTPS) server by opening Nautilus, then typing ctrl-L to open the location bar, then typing in davs:// server. example. com/folder/ name/ and pressing enter. A box then popped up asking for username and password.
There is still a bug however, because I cannot access the same location using the Places-->Connect to Server method.
Cheers
JP