I am unable to mount NFS drives either using version 3 or 4 with the latest webmin. I have Three ubuntu systems 2 of which have 10.04 and one 12.04. The problem tracks the webmin version.
ERROR MESSAGE "Failed to save mount : '/home/mark/Downloads' is not a valid directory name. The available directories on myth4.local are :
You get the above error where it says the directory you want to mount is not valid and it lists valid directoriies. As you can see the directory that is indicated as not valid is in the list of valid directories.
I verified that this is a problem with this version of webmin by using one of my computers with webmin version1.540 and can mount this drive no problem.
So to summarize, Mount problems occure with webmin version 1.590 using Ubuntu 12.04 or 10.04. It works correctly with version 1.540 on ubuntu 10.04.