Big issues with R6.5 to R6.51 upgrade on Solaris 8

A new Sun fire 280R server running Solaris 8 (+ latest patches) had Lotus Domino R6.5 installed & ran OK, obtained upgrade to R6.51 from this site. Attempted install - errors in post installation section

Installing Domino Server kits …

An unexpected error occured during post-install processing:

Died at (eval 33) line 50.

/tmp/sol/tools/lib/NIC.pm line 982

The installation failed for the local host

Removed /opt/lotus and the notes data directory - re-installed R6.5 - same error, repeated again with R6.51 full install & same error occured.

Investigation shows that at that point - it is trying to work with files it has placed in the /usr/kernel/drv directory !

Looking at the NIC.pm lines starting at 974 states it is trying to update the files in the /usr/kernel/drv directory.

I have raised this with Lotus support, but just hoping someone else had a similar experience and managed to get around it