Just thought I would post this in case anyone has a similar problem.
I have a Raspberry Pi set up with a 2 Terra-byte hard disc connected. I use it with NFS so we can store pictures and music as well as do backintime backups. I have had it set up this way when I ran Ubuntu and now also since I have moved to Mint and I am running Mint 17 cinnamon. My wife only has read access to the Pictures and Music directory but I have full access. It worked fine until the most recent updates. After that it started only giving me the same access as her. I had always had set up my laptop networking manually so NFS worked.
This time, for some reason networking had been changed to DHCP which confused me for a while