rsync_bpc syntax error with 4.1.0

I've updated my CentOS 7 box to BackupPC 4.1.0 to continue testing and ran
into the following with a manual backup:

This is the rsync child about to exec /usr/bin/rsync_bpc
cmdExecOrEval: about to exec /usr/bin/rsync_bpc --bpc-top-dir
/var/lib/BackupPC/ --bpc-host-name hobbes --bpc-share-name
/home/richard/Documents --bpc-bkup-num 55 --bpc-bkup-comp 3
--bpc-bkup-prevnum -1 --bpc-bkup-prevcomp -1 --bpc-bkup-inode0 3945
--bpc-attrib-new --bpc-log-level 1 -e /usr/bin/ssh\ -l\ root --super
--recursive --protect-args --numeric-ids --perms --owner --group -D --times
--links --hard-links --delete --partial --log-format=log:\ %o\ %i\ %B\
%8U,%8G\ %9l\ %f%L --stats hobbes:/home/richard/Documents/ /
rsync error: syntax or usage error (code 1) at options.c(1320)
[server=3.0.9.6]
rsync_bpc: connection unexpectedly closed (0 bytes received so far)
[Receiver]
Done: 0 errors, 0 filesExist, 0 sizeExist, 0 sizeExistComp, 0 filesTotal, 0
sizeTotal, 0 filesNew, 0 sizeNew, 0 sizeNewComp, 3945 inode
rsync error: error in rsync protocol data stream (code 12) at io.c(629)
[Receiver=3.0.9.6]
rsync_bpc exited with fatal status 12 (3072) (rsync error: error in rsync
protocol data stream (code 12) at io.c(629) [Receiver=3.0.9.6])

This is with the stock arguments so I don't know what part of the command
rsync_bpc doesn't like..

Thanks,
Richard

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