Upgrade broke NFS

Can no longer mount my NAS. I added nfsvers=4.1 to fstab. AI suggested that the upgrade might now be using 4.2. Here's the error from mount -v: Quote > mount.nfs: trying text-based options 'hard,tcp,intr,timeo=300,retrans=5,nfsvers=4.1,addr=10.X.X.X,...