It is not a good habit to have a NW client software with a newer version than 
the NW server. Although it should work as long as you do not want to do 
something that the NW server is not capable to do yet due to the lower version.

So something must have changed since 08/06. You only know what happed here. Do 
not forget that somebody else might have changed something.

Have a look at the partial backup log files as mention in the daemon.raw file: 
  Unable to render the following message: savegrp:KW3 * [BUClient]:H:\  See the 
file /nsr/tmp/sg/KW3/sso.[BUClient].aUyoi7       and others
They are specific to the backup process (save).
Run a manual backup (save) from the command line with added verbosity. As long 
as this does not work, you will not succeed in running scheduled (group) 
backups.
Worst case - reinstall the client software. Do not forget that the services 
might have been installed with another account than "Local System".

Finally, get rid of the wrong "nsr peer information" messages. Delete the 
appropriate ones on the server, storage nodes (if any) and client. These 
messages are just filling up your logs.

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