The new SMB2 stack deliverd with OS X 10.9 (Mavericks) often fails to connect to NAS devices or behaves strangely on server volumes, such as an inability to change file/folder names.

Some possible workarounds are:

First try using cifs:// instead of smb:// to connect to the server volumes.

If that doesn’t help, then there is a way to change all connections that use SMB1 by entering this command in Terminal:

echo “[default]” >> ~/Library/Preferences/nsmb.conf; echo “smb_neg=smb1_only” >> ~/Library/Preferences/nsmb.conf

To restore the default SMB2 you simply need to delete the newly created configuration file (nsmb.conf) with the command:
…

Source: Mac OSX Hints