My experiance with this is the following
For ages i had a NFS mount to my nas server, Created using Directory Utility and setup with my preferred options. I needed to do a PRAM reset to fix another issue with a misplaced mouse cursor I had in several applications after upgrade to Mavericks, apparently this also blow away my nas mount.
Creating a new nas entry with RecordName nas:/mnt/Data (nas is ny server name) works well until I started to add atributes to it because Directory Utility return Unknown error code (4104) on save.
Looking in /var/db/dslocal/nodes/Default/mounts show a file with the name nas:%2Fmnt%2FData.plist
from here on the record can't be deleted or managed using dscl, I tried
sudo dscl /Local/Default -list Mounts
nas:/mnt/Data
Trying to delete the record ALL returned various errors, I tried with/without backslashes and double backslaches as suggested in other threads, but no luck
sudo dscl /Local/Default -delete /Mounts/nas:/mnt/Data
sudo dscl /Local/Default -delete /Mounts/nas:\/mnt\/Data
both returning <dscl_cmd> DS Error: -14009 (eDSUnknownNodeName)
sudo dscl /Local/Default -delete /Mounts/nas:\\/mnt\\/Data
returning <dscl_cmd> DS Error: -14136 (eDSRecordNotFound)
or Directory Utility which throw the 4104 error on every save, so I deleted the file in /var/db/dslocal/nodes/Default/mounts with sudo rm nas:%2Fmnt%2FData.plist
So to make this work I created a new record with a name CRAP, added all the attributes, hitting save multiple times and the last thing is did, was to change the RecordName to nas:/mnt/Data a saved it. (Directory Utility throw a final 4104 error, but RecordName was changed to my nfs path)
!!!! Be aware that no changes works after the rename !!!!!
From here my nfs is mounted and works fine :-)
So, my conclution is that Mavericks can't deal with %2F as a slash, niether in Directory Utility or dscl.
wonder how long it will take Apple to fix this? 😉