unfs quits with "invalid open64 call: O_CREAT without mode"

[abma]

Binary package hint: unfs3

While trying an rsync to an (unfs3) nfs share unfsd quits with following message:

unfsd[31288]: *** invalid open64 call: O_CREAT without mode ***: /usr/sbin/unfsd terminated

1.:
lsb_release -rd
Description: Ubuntu 8.10
Release: 8.10

2: apt-cache policy unfs3
unfs3:
  Installiert: 0.9.20+dfsg-3
  Kandidat: 0.9.20+dfsg-3
  Versions-Tabelle:
 *** 0.9.20+dfsg-3 0
        500 http://archive.ubuntu.com intrepid/universe Packages
        100 /var/lib/dpkg/status

3: unfsd should never terminate!

4: unfsd terminates